Text does not convey context very well.
Actually, context is derived directly from text. Tone of voice, and inflection are typically not conveyed through text. I got it though
Also, unanswered questions don't convey value very well.
Here is an $80 "450 class" RC 'Copter
Here is a $450 "450 class" RC 'Copter
The responder was simply trying to help you out to get the best return on your money from an ill-fated attempt at a new hobby. We're really just trying to help you sell your item.
Just my $0.02.