Same thing is happening on Fleabay right now. A seller listed an butonholer as an 1868(or something like that) and had it posted for $150 minimum.. I pointed out that it had stamped patent dates from 1885... So now they relisted at as an 1885 for $95 minimum..
FYI - it is a domestic buttonholer with box an manual. Tempted but I will wait and see if the price goes down on the next go round...