Mobile Karma via eBay offers several used RIM BlackBerry, Motorola, and Nokia cell phones, with prices starting at $17.99 with free shipping. Pay via PayPal and use coupon code "CMOBILEKARMA29" for an extra 10% off, cutting prices further to $16.19. Deals end March 29. Notable phones, after discount:

• Motorola i335 Rugged Cell Phone for Nextel/Sprint for $16.19
• Nokia 6030 GSM Radio Cell Phone for AT&T for $17.99
• RIM BlackBerry 7290 PDA Cell Phone for AT&T for $20.69
• BlackBerry 8830 World Edition Smartphone for Verizon (pictured) for $49.49
• shop for more used phones at Mobile Karma via eBay

Note: These are not unlocked phones; they're still tied to the networks listed.

ThinkGeek.com takes up to 70% off items in its latest Clearance Sale. Plus, take $5 off orders over $24.97 via coupon code "9HBB", or take $10 off orders over $39.97 via coupon code "GEEKPUZZLER". With 248 items available, it's the largest sale we've seen from ThinkGeek in recent weeks. Shipping starts around $6. Some best bets, after coupon if applicable:

• Star Trek Illuminated Shirt for $14.99
• Young Mad Scientist Alphabet Blocks for $21.99
• DormVault Laptop Safe for $39.99
• Tauntaun Sleeping Bag (pictured) for $89.99
• Isis Impossible Titanium Puzzle for $164.99
• browse all items at ThinkGeek.com

Gibson.com offers hundreds of streaming video instrument lessons for free. In all, there are 730 lessons for the guitar, bass, drums, piano, and more, for beginner, intermediate, and advanced students. Several lessons also include a free downloadable PDF of the sheet music used in the lesson.

Of note, the iTunes App Store offers downloads of the Gibson Learn & Master Guitar Application for free. The app features a tuner, metronome, chord library, and video lessons.

Logitech offers discounts of up to 53% off on a selection of dented-box items, as listed below. With shipping starting around $6, each item is at the lowest total price we could find. it's worth noting that the item's box may be dented or scratched, but the product is new with a full warranty. The deals, all ending March 25:

• Precision PC Gaming Headset (pictured) for $14.99 via code "logi_31910" (was $22)
• Logitech Internet 350 USB Desktop for $14.99 via code "logi_31910" (was $17)
• Logitech MX400 Performance Laser Mouse vor $18.99 via code "logi_31910" (was $22)

DiscountMags.com has select magazine subscriptions on sale, as listed below. That's up to 86% off list and the best deals we've seen on these titles. The deals:

• 1-Year Subscription to Prevention for $3 via code "3817"
• 2-Year Subscription to Prevention for $5 via code "3817" ($2.50/year)
• 3-Year Subscription to Prevention for $7 via code "3817" ($2.33/year)
• 1-Year Subscription to Popular Photography for $4 via code "6976" (good for up to 3 years)
• 1-Year Subscription to Men's Health for $7.99 via code "3201"
• 2-Year Subscription to Men's Health for $13.98 via code "3201" ($6.99/year)
• 3-Year Subscription to Men's Health for $17.97 via code "3201" ($5.99/year)

Of note, take 20% off all other magazine subscriptions via coupon code "J20".

Dell Home offers the Iomega eGo II 320GB Portable USB 2.0 External Hard Drive in a variety of colors for $49.99 with free shipping ($0.16/GB) via specific coupon codes, as listed below. That's $9 under our mention from last month and the lowest total price we've ever seen for this drive by $5. Sales tax is added where applicable. This drive runs at 5400 rpm and includes the EMC Retrospect Express HD backup software (PC only). Coupons expire April 1. The deals:

• Iomega eGo II 320GB USB 2.0 Hard Drive in Red via code "$ZXW68F3VF97C6"
• Iomega eGo II 320GB USB 2.0 Hard Drive in Black via code "8P05$97LFK?0BZ"
• Iomega eGo II 320GB USB 2.0 Hard Drive in Blue via code "LMXK983??J$TF5"
• Iomega eGo II 320GB USB 2.0 Hard Drive in Pink (pictured) via code "R1T?K6NK2P9?W0"

Logitech offers the Logitech Ultimate Ears SuperFi 4 Noise Isolating Earphones, model no. IF-P7PSA0005-02, for $129.99. Add it to your cart and apply coupon code "superfi4_31910" to cut the price to $49.99. With free shipping, that's the lowest total price we could find by $69. These headphones feature three individual speakers for each ear, a frequency response of 20Hz to 15kHz, ten sizes of silicone eartips, two pairs of memory foam eartips, 3.5mm plug, and more.

Dell Home still offers the Dell Inspiron Zino HD AMD Athlon 1.6GHz Mini Desktop PC in Piano Black (no monitor) for $249 with $12.95 for shipping. That's tied with last week's mention as the lowest total price we've seen since December, when it was $23 less (since expired). Sales tax is added where applicable. It features an AMD Athlon 2650e 1.6GHz processor, 2GB RAM, 250GB 7200 rpm hard drive, DVD burner, memory card reader, HDMI output, Gigabit Ethernet, and Windows Vista Home Basic 64-bit.

JR.com offers preorders for the Onkyo 7.2-Channel THX Home Theater Receiver, model no. TX-SR608, for $449 with free shipping. That's the lowest total price we could find by $50. This THX Select2 Plus-certified receiver features 100 watts per channel into seven channels, Audyssey DSX and Dolby Pro Logic IIz, 1080p video upconversion by Faroudja DCDi Cinema, six HDMI v1.4 inputs (compatible with 3D formats), component and other video inputs, and more.

5stardeal.com via eBay Daily Deal offers the Laptop Buddy Portable Laptop Table for $29.99. With free shipping, that's the lowest total price we've seen by $5. Designed to fit in your laptop's carrying case, this aluminum stand weighs 1.8 lbs. and features a fold-down mouse pad and cup holder.

Logitech offers its Logitech diNovo Slim Keyboard, model no. 920-000927, for $99.99. Apply coupon code "logi_31910" and it falls to $49.99. With free shipping, it's the lowest total price we could find by $7. (It was $4 less during a 1-day sale in February, since expired.) This 2.4GHz wireless keyboard features the perfectStroke key system, a brushed-aluminum wrist-rest, and more.

Meijer offers the Pure Fun 8-Foot Trampoline and Safety Enclosure, model no. 9008TS, for $127.09. Add coupon code "THANKSFREE" to your cart to bag free shipping. (Note that you must be signed in to use the coupon code.) That's the lowest total price we could find by $47. Sales tax is added where applicable. This trampoline can hold up to 120 lbs.

Of note, Meijer also offers the Step2 Up and Down Roller Coaster Playset for $89.99 with free shipping via the above coupon. That's a price low by $35.

Adorama offers the Miccus ChargeBlock for iPhone and iPod, model no. CBFI-01, for $19.79 with free shipping. That's a slight drop from last week's mention and the lowest total price we could find by $24. This external battery measures 1" and boasts up to 11 hours of audio, 3.5 hours of talk, 3 hours of video, and 2.5 hours of Internet usage from a single charge.

360wireless via eBay Daily Deal offers this 3-Port HDMI Switcher with Remote Control for $12.99 with free shipping. That's the lowest total price we've ever seen for any 3-port HDMI switch with a remote by $3. (However, that deal included 3 HDMI cables, since expired.) This 3x1 HDMI switch features HDMI 1.3b support and switches signals up to 1080p.

Update: Better yet, Meritline has an almost identical switch for $11.99 with free shipping.

Dell Home offers its Dell Studio XPS 8100 Intel Core i5 Dual Core 3.2GHz Desktop PC (no monitor) for $649 plus $12.95 for shipping. That's $16 under our mention of this configuration from earlier this month and tied as the lowest total price we've seen for this recent addition to Dell's XPS line. Sales tax is added where applicable. It features an Intel Core i5-650 3.2GHz dual-core processor, 3GB RAM, 500GB 7200 rpm hard drive, DVD burner, NVIDIA GeForce G310 512MB video card, flash card reader, 15-month subscription to McAfee SecurityCenter, 2GB of Dell Online Backup for one year, and Windows 7 Home Premium 64-bit.

Of note, you can upgrade this PC with an Intel Core i5-750 2.66GHz quad-core processor for $49.