First to ester, you are showing everyone your phone number. 2nd if you bid say 10,000 but the starting bid is 499, it will show 499, until someone bids against you, so say they bid 799, you will still be the high bidder, but now your bid has increased to 799, you would not lose unless someone bid at least 10001, 3rd, $1 is equal to about 700 credits, if you were to buy them. So a 100$ gift card is worth about 70,000 credits in my opinion, although they ALWAYS sell for more. Good Luck.