I totally agreee with Mechamaniac. The puspose of the sale thread it to come forth and sell an item with a set price. If people wish to fish around for better prices, by silent bidding, then they should do it on E-Bay.
I think what has happened here is that since many people have now caught wind of the "Best Offer" funtion on E-Bay, people are now trying to do the same on the sale threads as well.
Personally, I don't like it. If you wish to make a straight up sale, then just post a pic of the item and a price attached to it. Otherwise, please use another media to get the best price for your item.
After all, none of the threads head as "Best Offer" only "For Sale".
...my two cents.
(that is my offer)