SOLD I have a GK 200MB that's in excellent condition, as well as a BRAND NEW origianl equipment GK replacement speaker. I got a good deal on this amp, so I'll pass that on. The newer ones (MB150E/S) sell for about 450-500 used pretty easily, and the 200MB's typically sell for about 50-100 less witout the new speaker. Lotsa' folks, especially upright players, actually like this older model better... it's eq'd a bit different. A little more mid punch. I'll save all the dickering right now and let this one go for 300+shipping+paypal (FIRM) WITH the new speaker (already installed). This amp is worth at least another 50 easily especially with the new speaker. It has the built-in chorus and compressor, tons of patching, etc. etc. You know the amp. The condition is not "mint" as it has some of the white lettering a bit rubbed off here and there, and the original owner (I'm only the second owner) engraved his SSN on it and then engraved it "out" when he sold it to me. It's very minor, not in a printed area. I can get pics out soon. Electronically, it's perfect. Knobs and pots are great. Very strong sound, awesome portability and construction, just not my tone, so I gotta' move it. I also have the little locking ring for the mic stand mount, which is hard to find and often lost.