I have a Robert Keeley modified Rat, from when he was just some dude modifying pedals. I have a Jaurnig DGTM overdrive that used to belong to Robber Ford. I don't know how valuable they are, but to me they're valuable to me. I have a Klon KTR from the first production run, but I'd prob sell it if the money was right. I have a Jetter 45/100 that turned me on to the whole Blues Breaker sound. It's switch is a bit faulty now and I have a replacement, but haven't sold the first one for sentimental reasons. I have a Spouse Black box that I don't think I'd ever sell. And probably my RC Booster like a few people have also said. I guess it's all overdrives for me!