I've had one of these since Black Friday, but I realized now that the price of CSC has permanently gone up, I'm not sure what to sell it for.

500 CSC is roughly 12.7m at the moment, which means 8000 CSC would be roughly 200m. That's quite a bit of dough. Would that be unreasonable? Should I lower it a little?

I would probably sell it for a bit less than that because most people buying the plushier with sP probably made all their sP before the jump in CSC prices. But I wouldn't go lower than 175 mil if I were selling it myself.