Hello! i came acros the chance to buy really cheap 3 70's MXR procesors. A super Flanger and 2 mini Limiters. I went to try them and the conidtions were terrible, i pluger the bass into a bad mixing console, and i used a extremely crappy headphones. The guy didnt have an amp to try them out. They seemed to be in perfect conditions, but i dont know soundwise. Ther 3 of them were installed in a box, which was fed by a 12 volt adapter. How much do you think these units are worth? I dont think im done use it, but i want to re/sale them later, so i must be sure they work fine. What else should i check? Is the adaptor the proper one? Thanks for ANY other input.