You have to be in at the very start on those meme coins, which is hard because there are so many new ones all the time it's hard to keep up... I haven't played any in awhile now just for that reason.
If you still have the instructions with a set number it's easy to search the set on eBay to see what they go for these days. Sometimes you can be pleasantly surprised!
I think I have most of my instructions in a binder somewhere, but most of them have been torn apart and don't flow together much anymore. I will have to check though. Yeah, that's the problem with meme's I guess. When you start hearing about them it is too late.