Ebay auctions finish at a fixed time so sniping does not extend the auction run time.
However, the fact that Manships auctions are extended by last minute bidding is fair in my eyes, as it is exactly the same as the auctioneer shouting 'Any more bidds, going going gone'
If gives other bidders time to decide if they want to up their bid or not, and as were all grown adults then its ultimately our decision how high to bid.
Some open ended auctions don't work on this principle though - more along the lines that it won't be sold till the seller gets the price he/she wants.
Pointless running an auction on that basis, may as well start the auction on a min bid price of what the seller actually wants.
I am more doubtful of auctions that have to be increased by a minimun of 10% of the current highest bid.....on a £1000 current bid that's £100 (okay - obvious I know), but I believe that £20 increments are more than fair at this price.
Go on, some one tell me if you can afford to up the bid on a £1000 current bid you shouldn't have to worry about £100 here and there....