I do not own a featherweight, but would like one. My sister attends lots of auctions in rural areas (where she lives) and I wondered what information to give her so that she can spy out any that may be available. She recently was able to get a Bernina for $20, so I know they are out there and if it's raining, fewer buyers show up. Besides a photo of a featherweight, what other information should she know? Thanks!