Even if you buy a new pump, it's still going to have some small pits in it! It's a casting!!! It is impossible to get a perfect/flawless product with a casting!!! You are nuts for trying to sell those because they have some small pits in them!!! You either have more money than you know what to do with, or you're half retarded!!!

BTW, aluminum can be chromed. I even saw a chromed jet pump on eBay not that long ago. It's a tricky process though, and very easy to F'up. I personally like polished aluminum better than chrome anyways.
Since it's already polished and you don't like it, I would get it powder coated. That would be really slick and would still have a great shine to it because of the polished surface underneath.
Good luck with your sale anyways. How much are you looking to get out of it?
I'll give ya 50 bucks for it!
