I think it's important to remember, that the low prices once associated with anvils, were a by-product of the extreme swing in their ubiquity vs commonality of use. When anvils were $1 a lb regularly, it was due to the decline of numerous types of tradition, not the least of which were the smithing professions. Never otherwise in history did they have such low relative value.
Even a couple of hundred years ago, the adjusted cost of anvils was huge comparatively, I haven't looked at the numbers, but I'm guessing it was probably significantly higher than what new anvils cost now. They were a lifetime investment, and the core tool of many specific trades, and necessary for all types of work outside those trades.
I'm not a fan of the hoarders either, although there are some legit collectors. I also tend to prefer a tool be used than collected, but if we push that philosophy too much, most of us that make higher end knives, would probably be out of business, hard to justify numerous mutli-hundred/thousand dollar knives for "general use", but as collectible art, it's a different story.
If you consider the value of an anvil, the new prices are more than fair, we're just used to the convenience, as a society (entitled even) to casually pickup a trade, as a "hobby" or whatever, with minimal investment, to try it on. Thus the idea of a couple thousand dollars investment seems outrageous. If you consider it from the standpoint of a tradesman a hundred years ago, the adjusted percentage of income, relative to the potential, they'd probably be thrilled to pay what we're paying.
FWIW, I've had a very nice large(375lb) Fisher Saw anvil, with beyond excellent rebound and an unmolested faceplate on CL and FB for less than $3 a lb for weeks, with absolutely no interest. So is the question whether there are fair prices out there, or are we feeling entitled to incredibly unfair (in our favor) prices because of the extreme trend of a certain period not so long ago?
I paid $4 a lb for my main anvil (mint 250lb fisher, london pattern), and was thrilled to get it for that, even though I'd bought numerous others for less. I knew it was as good as any new anvil I'd buy, and it was the size and style and brand I wanted.
Just my 2c, take it for what you will.