Free to good home (just pay shipping)...
A Lowrance Airmap 500 portable GPS. Has the latest available Jeppesen Americas database for this product from August 2009.
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Comes with everything pictured - RAM holder (just add clamp/cup/arm to fit your aircraft), remote antenna, instructions, software, update cable, storage bag, plus a unique power/serial cable - a special Y-cable with 12-volt cigar-light plug and a 9-pin serial connector (used for passing GPS data to a JPI FuelScan-450 or similar fuel totalizer).
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I used this setup for many years in my 150. Easy to use, reliable, back-lit for night use, runs on AA batteries or ship's power. The size fits a 150 perfectly.
All you pay is for shipping by USPS Priority Mail Flat-Rate Medium box, $13.65. Mail a check, send Paypal, whatever, after you get the box.