Those stores are in business to sell, like any business. If you give them a set budget, they will tell you what they can sell you from among the brands they stock, and if you're lucky they'll tell you what they recommend among that limited range.
Remember, there are lots of different beasts out there.
Integrated amp.
Receivers.
Audio-visual receivers.
The more you bolt on, to hit a certain price point they have to economize elsewhere.
If you don't need some features (e.g. 5.1) go more simply.
If you just need an integrated amp, I'm sure the forum can provide several good recommendations. New, I'd look at Denon and Yamaha. Lightly used, you have a greater scope.