For sale is a GK MB500. There is plenty of love for this tiny powerhouse on TB and elsewhere. Don't let the tiny, 4 lb package fool you-I can bury my rock band with this thing and a 410. The amp is in good condition, the only things that keep it from being in "excellent" condition are some light scratches on the bottom (see pic) and that the "-10 db" switch doesn't illuminate when activated (I have never actually needed to use that switch, though, so it hasn't really been a problem. $299 shipped to CUSA, includes power cable and footswitch.