How do you determine the value of a machine?
I'm trying to help a friend determine the value of her machine. I think that it is a 1922 Redeye? It looks like it's been modified with a Reverse/Stitch Regulator lever. It is an electric machine. She's putting the machine up for sale for a benefit and we don't really know where to go for information. I'd appreciate any help.
Elaine