I have sold pianos before. I notice a lot of people on this forum bashing piano sales people. If you find you are not being treated with respect, it may well be because you’re not being a good customer!
BTW, how the hell do you become a "bad customer" anyway?
But let us return to sales people.They are usually liers, IMHO. Of course, there are exceptions, but the majority will say anything in order to achieve the sale.