Anyone know what kind of Pleco this is?

It is a Hypostomus punctatus, Common pleco, according to PlanetCatfish.com.

Unfortunately, most fish stores will not give credits for overgrown fishes, especially common plecos. They will usually just take them in for free.

I actually have a very good realtionship with this local shop 9Albany Aquarium) and they have already stated they would take up to 10" plecos from me as they get requests for large plecos all the time. I do know what your speaking of but this case is slightly different. The reason I am asking is a friend of mine bought a "common pleco" from pet smart about 2 years ago and it turned out to be a Royal plec (Panaque nigrolineatus) which around here are quite expensive, he got it for 1.99 when it was a baby by the way.

That's good, especially if they will pay you for it. As I stated, most stores will not give credit for fish they take in.

Most chain stores will mistakenly label gibiceps, royals, etc. as commons, so it's not uncommon.