Large quahog clams, which are best chopped or ground to be used as baked clams or chowders, can cost $3 to $9 per pound. Manila clams can cost around $10 per pound. If these types of clams are available, most merchants will sell them in one, two or five pound bags. For example, CrabVille.com is an online store that offers fresh caught clams from the Chesapeake Bay. The clams sold through this site are caught from Chesapeake Bay daily.