We have asked this many times, and people still don't do it. It sucks and I don't know why they do it. Just type SOLD next to price in red instead of over it.
because if john q public is hard up for money and sells his bat for the low low so he can pay his baby mama, then people that have the same bat will get low balled and get the "well i just saw one sell for $xx on here" card thrown at them.
pm the seller if you want the sold price.