This is kind of funny as just yesterday I was browsing overdrive pedals on ebay and went past a bunch of black Russian made Big muffs that were going for a bit of money. I had to look into to it a bit as I have an old black russian big muff I bought about 15 years ago from someone at work for next to no money. It has pretty much sat in a box ever since as it didn't really do anything for me. It's not too bad to be honest, but at the same time not compelling and I've always though it looked cheap and nasty. Still, if it's worth 4 or 5 times what I paid for it I can't say I'm too unhappy.
I gave away a old Rat not really digging it.
Dude flipped it on ebay for 200 bux.
I'm still pissed. LOL