that's the thing- we don't. I know one antique store with 6 or 7 razors- all badly chipped, broken in half, rust buckets or otherwise not viable as shavers. they want upwards of $50 each for them.
the best source so far seems to be the shops that resell estate sales.
The postman knocked on my door yesterday and was at first willing to give me a small parcel, but then his electronic device, where I had to sign for it, crashed. He tried to restart it four times and then had to leave without giving me the parcel - it was a bummer, but not his fault.
So today I picked it up at the post office