I also have a question about buyouts, i offered the b/o on an item i wanted in an auction once, and it turns out 5 min later someone offers b/o +50k, i was liek wtf, i offered buy ouy, i thot that meant u had to sell it to b/o offer, i didnt get the weapon obviously, so if someone offers a b/o, but the b/o can be outbid, wat is the purpose of the b/o? :/
A few things to consider...
1) Generally nobody even tries to outbid the b/o.
2) If somebody actually did it, it was probably ridiculously low and the seller either wasn't very experienced or got bad PCs. In this case, I'd say there are too many people who get scammed in GW already.
3) The best policy is to wait for a few days, then set b/os based on your bids.