How much an item is worth depends solely on what someone is willing to pay for it.
If either of those keyboards sell then, yes, to someone they are worth the price asked.
They may not be worth it to me or you but may be worth it to someone else.
I personally think that the model m mini's are way over priced but since there are people willing to pay the price asked for them then undoubtedly they must be worth that price.
You can buy a decent Model M for $20. Even a second hand Model M is better than a NIB AT101W.
Another personal opinion. Whats makes it better??? Maybe better for you, maybe better for most people on this forum, but not better for everyone. Certainly not better for me, I'll take the at-101w over a model m every day.
I'm not a fan of buckling spring & I am a fan of alps switches.
I'm not going to preach that the at-101w is a better keyboard than a model m but I will say that I prefer the at-101w or a alps switch board.