Trace Elliot SMX Dual Compressor - $55 shipped (Continental US). Works great. Dual-band compression in general can allow much more finger-articulation sound and upper harmonics from your bass than a single-band system. This compressor is no longer in production and has a cult following amoung bassists. Check out the reviews -
http://reviews.harmony-central.com/reviews/Effects/product/Trace+Elliot/SMX+Dual+Compressor/10/1

http://img340.imageshack.us/img340/4831/pict0027jd2.th.jpg (http://img340.imageshack.us/my.php?image=pict0027jd2.jpg)



Aphex Punch Factory Optical Compressor - $55 shipped (Continental US). Also works great. Very popular compressor. The optical technology allows for very clean and subtle bass compression.
Reviews at HC http://reviews.harmony-central.com/reviews/Effects/product/Aphex/Punch+Factory+Compressor/10/1

http://img473.imageshack.us/img473/4472/pict0026hy9.th.jpg (http://img473.imageshack.us/my.php?image=pict0026hy9.jpg)

Sorry, no manuals or AC adaptors (I used batteries only).

pm sent on the trace comp...

Killer price on that Trace! I see them sell for two to three times that on Ebay.

payment sent for comp.