"Max Bid:
Your maximum bid will be in the currency of the auction. If the seller is accepting US dollars, then a max bid for 125.75 will be for 125 US dollars and 75 cents. And if a seller is accepting German marks, then a max bid of 75 will be for 75 German marks. There is no need to make conversions. Simply enter your maximum bid in the currency that is being accepted.
"Additionally, Auction Sniper follows eBay rules. So while we send eBay your maximum bid, you will only pay the next highest bid above the current minimum." - AS FAQ