What happens to the bids I don't want to pay on ebay but already won?

Fail to pay and they open an unpaid item dispute against you. Get a couple of those and you likely won't be buying much from anyone anymore. Get three or more and you can say goodbye to your account forever.

You are what is called a deadbeat bidder. You cost the seller money which costs eBay money. They will drop you like a hot rock.

You may be sued.

Or but not likely arrested by the FBI for "wire fraud" IF you have taken delivery of any such product or service.

Definitely your Credit Rating will be affected by "non payment".

Which could lead to Credit Cards being cancelled, and your information listed as a "Bad Debter" on the Internet Credit Card clearing house.

Being Banned from the Auction site(s).

If you are the high bidder and won the auction you are obligated to pay for it.

too bad - a bid is a contract