Most coin shops will buy rolls of common wheat cents and dateless buffalo nickels from you if you have a quantity of them. Most coin shops have thousands of them in their back rooms. How many is too many? They will never sell all they have. Why buy more?
I once bought a few hundred socks and thought I would never need to buy them again, boy was I wrong. They seem to vaporize. Maybe common date circulated bison and wheats are the same way?
I would suppose that any offered buys would be minimal in cost to them. They are probably looking for someone to make a mistake and sell them a valuable coin un-wittingly. Dave
Oh they will sell them, there are always wholesalers that buy up large quantities of these coins and sell them to new collectors. The shops eventually sell them in bulk to these wholesalers.
They buy them and then sell them "up the coin food chain" to traveling wholesalers who stop by every month or two to pick them, and other, things up. These traveling wholesalers then sell them to their contacts further up the chain until they get to where they are going. Other coins this happens to regularly are modern $5 gold commems and modern proof and mint sets (Note-especially to modern proof and mint sets!).