I don't sell most of this stuff - since it's basic and rather low value, and I ended up with it because it was part of a "lot" including other items I was after - I just give it away instead. Otherwise it will be stuck in a box in a closet somewhere. I don't have much "extras" of the rarer, higher value items, usually they are what I'm after when I end up with a large mixed lot, and the rest is stuff I don't want or have a use for.
With the stuff pictured above, the seller didn't even include a picture of the closed Wilcox & Gibbs set, or I expect I may have had some competition getting it. I wasn't sure what it was going to be based on a bad picture of it open mixed in with the other stuff. I knew it was something I didn't have, and there were enough other items I was willing to go for it. There have been a time or two I guessed wrong LOL!!
Screwdrivers are the one item that is almost always missing from sets. I hope to some day get a set of the "corkscrew" screwdrivers and stilleto. I have an early puzzle box that would take them, but they are the hardest items to get. Since I have about 50 sets of attachments for my collection, I don't think I'll ever have extra screwdrivers - maybe the Greist ones, but not the older Singer ones.