I've got an old set I use every once in awhile , 'bout 1910 vintage & agree there's little-to-no market for such .... but condition does matter !
I'd give the set a tip-top cleaning , a wrap in acid-free tissue , just because (these tools were designed to be kept clean & lubricated) ....
On the happy side of things , old Auto-Cad programs are going down in price too !