What was the item?
For that size of fee, I would guess you either listed a motor vehicle for sale or listed an item with a reserve.
It is probably not a scam.
It is really important that you read everything carefully before you sell on the site - especially if your understanding of English is not excellent.
"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)
