Hi! It is highly unlikely that anyone bid $100 for the item, but not impossible. Ebay uses increments in bidding. If the starting bid the seller is asking for is $9.99, then that is what the first bid will show up on the screen as, even if the bidder really bid $14.99 or whatever.
If the next bidder bids $11.13, thinking or hoping that is higher than the first bid, ebay will tell him he is outbid. Because of the 2nd bidder's bid offer, ebay will use more of the first bidder's limit to keep him one increment in the lead, but no more. First bidder's bid would now show as $11.63, with two bids having been placed.
Either bidder and others besides can come back and bid again and again. That is how sometimes things go for more than they are really worth - bidders get caught up in the action!
AuctionSniper lets you avoid contributing to such bidding wars by saving your bid for the end. You decide in advance on your MAX price you would be happy to pay, then set it to go in AuctionSniper near the end of the auction (like with 8 seconds lead or so).
If the auction goes past your max price, you will be outbid. If yours is the highest bid at the end, you will win. It doesn't matter who is ahead off and on during the auction. It only matters who has the highest bid when the auction ends. (AS will usually notify you by email in advance if you are outbid early in the auction, but if it happens in the last little while, you won't know until it is over. But if you really bid your MAX, it doesn't matter anyway. It just means the other person paid a price you think is too high! If you hang around and keep looking, another item usually turns up. After you search for an item a while, you get a good idea of the going price. If you are patient, you can usually get a bargain. If you are in a hurry and are willing to spend the money, you can often - but not always - win.)
Make sure you check out the seller's feedback rating, especially negative feedback, terms of sale in small print, etc. Also, don't forget to check the shipping fees and method of payment.
Anyway, most people learn to use ebay, then later learn to use auction sniper to bid on ebay for them. It must be tough trying to learn it all at once! Take time to check out ebay's tutorials and help, like bid increments, proxy bidding, etc. Then check out auction snipers tutorials and peruse the forum. You'll learn a lot! (and probably make a few mistakes, too, like most of us did. Oh, well - the price of education.
)
I wish you well!