I've had the same problem myself.
I've been to a "big box" store and I asked if they had a pistol is stock. I already have one and wanted a second. He told me that they don't carry it and wouldn't take one in on trade because the gun is pure junk, then he added, "I'm a gunsmith and I know these things". I know better because I've put over 500 rounds through mine with no problems. I might go back if he had said that we don't carry that manufacturer because they are considered lower quality by their corporate office. I would have taken it at face value and continued shopping, but he took the Corporate decision and tainted it with his own opinion.
Now the only reason I'd go back to that store is if they are the only retailers that carry a item and I think I'd rather drive to other location rather than go back to that location.
Kershaw Shallot 1840, Kel-Tec P-3at, Kel-Tec PF-9, Glock 17, Glock 19, Glock 26, Kel-Tec SUB-2000 9mm (Glock 17 mag compatible), Maverick Arms 88 Security 8-shot 12 gauge.