I've never had a problem with the salespeople at Ace, but many have so I'm sure it's only a matter of time, and when/if I do, I'm done with them.
I've bought a lot of guns there over the years, but I knew what I was looking for and what the going price was, and usually their price was pretty much in line. Some of the prices on guns are stupid high though. I just laugh and move on.
Prices are beyond terrible at the Fudd and Stream across the road on most things not on sale.