I have experienced things like that, but in SUMOCOIN coins, at that time the price offered on 1 sumokoin was equivalent to $ 3000, because I was interested in depositing around 100 sumocoin but when I tried to sell, my order was not executed, and when I tried withdrawal can't be done, maybe the exchange is a scam just want to take advantage of it, I suggest to be careful not to be easily tempted by a high price bid when selling our assets but having different prices elsewhere this could be an indication of a scam.
There was never a time when sumokoin was worth $3000 so not sure where that information came from. Perhaps you mean $3 each and you had 1000 sumokoins, then it was worth that much!
