I'm with Evaristo on this one. Fair enough wait until it gets down to the last three minutes, that's just smart. But to then extend it inside of the last three minutes? That's pathetic and rude in my eyes. And as he points out, it *may* exasperate the other bidder (the only potential upside I'm aware of), but it also extends the auction to the point where it often attracts other interested bidders who might have missed the auction had it not extended.
And as for the next guys point - I think it was coach lambini? - don't ever PM me if I'm in a bidwar with you. That's disrespectful to me, to the seller, and next to cheating in my eyes. If you wanna do it then whatever, just don't try and involve me in it. The harder you try to force me out, the more likely I am to continue bidding. If I want someone, I bid on them. If you want them too, then outbid me, don't try and cheat the market and deprive the seller of what they deserve.
If everyone had the common decency and courtesy to bid as soon as the final three minute window opens, and the respect to let the market play itself out and not try to privately tamper with it, it would run a LOT better I feel.