Wow. My LFS had one that was at least 16" and they were selling it for $200. After a few months, nobody bought it so they put it in their display out front. 15 minutes later, sold.
i used to live in fresno what lfs is it is it pet extreme,whiteys pet store,aquatic aggression, aquatic pets if it is any of those tell me because one of them always had huge clams
Captive Critters in Fresno has the clam I was just there on friday and he still had it. He had the clam in a 125 Gallon tank, but let me tell you it looked way to big for that tank.