I worked in music retail in various positions for over a decade.
Sales people are human like anyone else,they have good days and bad.
And in my experience-lets face it, there's one or two...errr... "faulty customers" out there.
Went against my own "golden rule" and bought a lovely s/h Musicman Stingray mail order from BD.It was spot on,arrived just as described by Mark.
Same with a Markbass cab.
One of the few places I'd have faith to "buy without try."