[Snapolit1]

I've never used one and am not sure of the benefits.
If there is an item closing on eBay, why can't I just wait till 3 seconds is left and then bid my maximum and see what happens?
Does a sniping service do anything different that this? Just trying to understand the allure.
Or, if I don't want to bother being at my computer when the auction ends, I can just bid my maximum a few hours before the auction ends and then forget about it. Wait for an email from eBay.
Is there something else a sniping service does that I'm missing?