What will happen if I use here and another sniping website to schedule a bid with a different price?

Questions.

1. what if I use 2 snipings to bid from here and another site with the same price?
2. what if I use 2 snipings to bid from here and another site with different prices?

If you do it, you better use the same eBay user id to snipe so you won't be bidding against yourself.

Since you'll be using the same eBay user id, then you will not drive up the price unless someone else put another bid.

For example if I set myibidder price at $100 at last 5 seconds and I bid at the same time at $90 from eBay (using the same eBay ID), will my manual bid complete against myibidder price? Thanks

fraser7588,
As I mentioned above, you can not compete against yourself on eBay.
That's how eBay is designed.

So this is safe to place a manual bid, and put a snipe for a higher amount.