I bought mine from their site, maybe 13 hours later, got my login info. Buying it off of ebay just sounds shady. I don't know the price but here in the US, 20 bucks for the amount of saves you will edit is well worth it.
xViolet makes a good point, if you spend X amount of money to "share" the seller's info, Xploder can still ban/suspend the account, which then you are out of luck, and I doubt you would get a refund.