About a year ago I found a Disston D-16. Not a No. 16. But a D-16. The condition is what I would call "fine user". The handle is a bit chewed up and the plate is short, as it was at some point retoothed from an 8TPI to an 11TPI crosscut (I know because it has stamps for both). So I've been using it, because it didn't look like it would be anything of value. And it's a great saw to use.
But the thing is, I've never seen another one come up for sale anywhere and have no idea of it's value. I'd hate to keep using it if it's a super rare and valuable saw. Judging by it's condition, I wouldn't think it could be worth much more than I paid for it. But after a year of occasionally peaking at that auction site and several other places all over the internet, I've never seen any record of another one coming up for sale. So they're at least a little rare.
So am I an idiot for using it? Has anyone else come across one of these before? Is it okay to keep using it, or should put it up on a shelf somewhere and buy another crosscut?