They seem to go by the pound. Good ones are definitely hard to find. I was supposed to pick up my late father-in-law's anvil from
his days at SF Railroad but I don't think I have enough truck or any way to load a 250# one. (the stand it's on is probably another 200)
The room available in my garage is also at a premium for something I'd use 2 days worth out of a year.
As the drill sergeant said, "I taught you everything you know. I didn't teach you everything I know."
"Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so."
- Douglas Adams