I've come to the conclusion that anything I put in the signal chain detracts from my ability to affect the sound of my bass with my fingers. I won't trade finger power for gadgets. So, for your purchasing consideration:
Sorry for the fuzzy pic, if you want a better one of any of the units let me know.
Digitech Jamman - Older model with two foot switches. Bought from a TB'er and it never left my house. Pretty much like new. With Power Supply. $150 Shipped OBO.
BBE Opto Stomp - gigged a few times -
$40 Shipped OBO. SOLD
Boss LMB3 - Bought from a TB'er and gigged a few times, still in great shape very few little nicks from light use.
$40 shipped OBO.GONE!
Zoom 506 multi-effects unit. Showing some scuffs and wear but works fine. With Roland Power supply. $25 shipped OBO.
EARLY black label Boss Oc-2 Octave pedal. Pristine, case kept all it's life. $80 shipped OBO.