One thing about this that comes to mind is that if they're the only audio dealer in town you don't have to worry about competition. They have less reason to treat people well if they don't want to. One reason they might be loath to take trade ins is that they have comparable used equipment in stock and its not moving. For someone in your situation an audio show would be a good alternative because it's ethical showrooming. You could listen to a lot of stuff, figure out what you like and then buy it online - or even used. That wouldn't solve your trade-in problem, but it would seem a solid state AVR would be pretty easy to ship and thus selling it yourself might make you more than you'd make in trade.
"High end" store snobbery
Our county lies in a fairly remote part of the country.Our major city of 100,000 has one "high end" shop so to speak.
I visited them yesterday.The store has limited selection of decent stuff-a few McIntosh amps.Marantz.Paradigm ,Focal,Sonus faber etc.No Wilsons or Bel Canto category.
I asked then if they take trade ins-I want to upgrade my one year old Yamaha RX4 AVR,worth $500 retail.
They said they only take high end components for trade i.e.McIntosh etc.
After that conversation, the 3 store employees pretty will ignored my presence and I continued browsing their meagre inventory.
Lo and behold!
In a corner I spotted about 30 items-old Pioneer,Yamaha amps and even an equalizer from the 1970s.Prices ranged from $75 to $500.
I asked :"what are these"
response from employee:"oh, those are items we are familiar with as they were swapped out for upgraded gear by our customers."
Thanks for tolerating my rant...
Gabe