Because people know if they say its too expensive regardless if theyd buy it at that price, he might lower it. or they are just cheap and aren't looking for a new sub anyway. 250, doesn't sound bad to me, but more information is needed.
I didn't notice if he mentioned what amp he was using that blew it, but i reckon any amp can clip.
I bet he was just not using a tcab box.. thats why it blew.