There is only one way to buy on Ebay.
That is to ask yourself "What is it worth to me ? " Just say it's part way thru the auction and is at say £30.00 you work out that whatever that part is worth £100 to you but you , like anyone want to pay as little as possible.
So mark it for watch, don't bid and then in the last 20 – 30 seconds bang in a bid of £108.80 and sit back. you will either get it or not.
If you don't get it it's because someone has put a far higher value on it than you. nothing you can do about it.
If you do get it you will get it for the next highest bid that's on so you will pay anywhere from £31 to £108 Just because you put £108 on doesn't mean you will pay £108 only if the last bid was £105 as it goes up in pounds to £100 and fives after £100.
Now why £108.80 ? when you are prepared to go to £100 ?
If you are willing to spend £100 then £8.80 extra is a drop in the ocean and there are people out there with the same mind as you [ lots more now this post has gone on
] and if they think £100 is max then some put £101.50 on, the clever ones put £105.50 on.
I know you can keep going endlessly but there has to be a limit.