Stage 2,
I also tend to do this as a matter of course, regardless of what I'm buying .... if it is of any substantial value. It's just simply good business. Also, it doesn't appear to be too difficult to see who the "salespeople" are here. Any salesperson, that would feel "offended" by, or would consider being asked a perfectly legitimate question by a customer, as being "screwing with" .... is in the wrong line of work.
It may be due to all the years I spent working in a field where accuracy wasn't "optional" - it was "first, and foremost" .... but I also tend to be a stickler for accuracy, honesty, and attention to detail (where it counts). I think anyone that would be willing to accept less, is lookin' to get screwed. This is not a personal matter, and has nothing whatsoever to do with trying to "out wit" anyone. I feel in most cases, it would be immature to even consider the thought. Are folks are just supposed to take-in any 'inaccuracies', and/or lies .... and blindly accept it? Then if you do make a purchase, and lay down your "cash".... you can bet they'll be checking the "validity" of those $100 bills you just laid out - to make sure that YOU aren't being "dishonest". But this is just 'good business'. Some might take THAT as an insult .... I do. Works both ways guys.
If someone doesn't at least have the honesty to admit they don't know the answer to an important question; but rather try to BS their way to a "sale".... without regard to the customer's needs or wants, possibly to the detriment of the customer's best interests .... this is not a place that will be getting any of MY business.
This also, IS NOT a matter of knowing "all" the answers, NOBODY does .... or is expected to, regardless of the 'field', or subject matter. It's simply a matter of whether a person - or place of business has the integrity to admit that they don't know-it-all, but does however show the initiative, and willingness to 'make the effort' to FIND the correct answer to a question that is asked by a potential customer. Not too much to ask .... IMO.
We've seemed to have become a country where mediocrity, incompetence, and outright deceit, has become the 'norm' .... and is considered by some, to be 'expected', and is tolerated much too often. I've worked hard for what I have, and don't appreciate it when some 'moron', thinks they can BS their way into my wallet. Not gonna happen. I simply don't like to reward stupidity, laziness, or arrogant indifference.