It's very rude when people do that!! Don't they have common sense??

The first day I got Sam we took him to petco. Well, I was holding him and some lady and her husband came over and says "Is your springer puppy for sale? We breed springers and would love to buy him."
First off I told them he is a COCKER SPANIEL. and then i said if they were really breeders, for the right purpose, they should be able to tell the difference between springers and cockers!!!! and of course i said hes not for sale and that if he was i woulden't ever sell him to THEM. they looked angry because me, being a so called child, shoulden't be talking to them that way. well i bet i am smarter then them!! lol