I personally don't understand what you are mad about..
They offered a product described as they saw it.. AND you've had many folks tell you how taxidermy works.. It's VERY not life like and made with foam and other things.. that's WHY they tend to do hunting trophies and not do pets. Did you take photos?
So they don't appear to be liar.. just place a different value on the product than you did.. As the buyer you have the right to walk away.. and you can try to negotiate.. but why be mad that someone didn't agree to the value YOU placed on their product??? Ever buy art work? It's not usually cheap.
That's not ripping someone off or trying to to... it's selling a (poor quality) product.. Regarding inset of eyes and such.. it's a craft not ALL will be good at it. So the birds you were looking at were more crude.. different artist, different time, etc.. At least, that's how I would perceive it.
I'm glad you didn't buy it too, maybe you can pick it up at Goodwill next week! Or not since you think they're fake.
As a person, who's lost loved ones AND raises chickens plus seen hundreds of taxidermy birds at museums... why would someone come to an "estate sale" and like a complete arss over a lousy $30?! That's both greed AND arrogance..
Please remember raising chickens doesn't quite make us experts... and certainly doesn't teach us how to treat our fellow human beings.. but it does continue to grow our learning adventures!
Also.. energy spent sweating things like this bring bad hormones. Let it go. Goose blah blah (deep breath).
Kindness is healing!
I'm still on page one and reading the rest of the thread and mean to support you (while I learn), not ugliness. Can't wait to see what the outcome's been!