Ebay is not like an auction on TV where they say "going, going, gone!", and the auctioneer waits until everyone has finished bidding.
Instead, eBay works more like a tender process, with a fixed ending time. Everyone has equal opportunity to make an offer, and nobody really knows what each other has bid. Whoever offers the highest, wins.
So, irrespective of when the bids get placed, the highest bid wins. Therefore strategically it is usually much better NOT to place a bid early, because it gives other people the opportunity to counter-bid. Much sneakier to hold off until the dying moments.
These "snipe" bids (snipe as in sniper, who shoots you out of nowhere) are the most common bidding strategy with experienced buyers. There is no second chance, the snipe must be extremely decisive... the techinique is to decide on a maximum price and offer it. If you win, great... if you miss out then the other person paid too much.
A saying that I heard years ago sums it up perfectly...
The nibble bidder bids for a bargain and hopes for a win - yet the sniper bids to win, and hopes for a bargain.