I think you're correct. Definitely if the value is being considered for a tree that will produce lots of good quality figs for your home.
But, legitimately, there are some people make the informed decision and who are willing to pay big bucks and take a chance on something new for the excitement, and the potential of what it might be. Someone who is a collector vs, just someone who wants to grow excellent figs... They want the rare and harder to get fig. I feel it's valid... at least for them.
Then there's the buyer who pays $2500+ for a tree... not because they feel it'll provide them $2500 quality figs... and not because they are collectors... They're investing. They figure they can grow it out fast enough to sell it and make a profit. In my opinion, as long as nothing is being misrepresented there's nothing wrong with that either. I think Angelito is a good example of this. It's an outstanding fig. One of the best. Would I have ever paid $2500 for a tree? No way. I just grow the trees for myself. If I was a seller and felt I could grow it out and share cuttings and trees as an investment.... Sure
Will the cost come down over time... definitely.
My $0.02
@coop , You've been growing figs a long time and have a stellar reputation... If I sold figs and had I new variety that I thought was really hot, I'd want to send it to you gratis just for your endorsement!