The mortice gauge is very cool. Its probably your oldest tool. Probably the most valuable too.
The pindrill is very unusual. Not much value but then I don't collect tools by value anyway. I just like cool.
I have no clue about the homemade gouge tool. I doubt it was made for woodworking, maybe gardening?
Expansion bits were all the rage for a while. They were expensive and people bought them like crazy.
You will always need them around because they will drill a bigger hole than you have a standard auger for. Plus, the day will come you need a weird sized hole and you can adjust for any size.
Last, when you have extras you can grind the large cutters into a profile and make toy car wheels or rosettes. Manufactured bits that cut these profiles sell for a --lot-- of money. 60 or 80 dollars apiece. You have what you need to make one for free here.
If you look in the first picture near the bottom, these are rosettes I made with an old expansion bit.
They need to be very sharp to work well. You will mostly be drilling shallow holes as they don't feed the chips in a deep hole.
Make no mistake, if you let out a big cutter and go to boring a 3" hole, it takes tremendous torque to cut even when razor sharp. So you need a brace with a wide throw. Your standard 8" swing brace will not do! Look for a 14", this is about the biggest common size.
Expansion bits have little to no value on the collector market. Only mechanics who have a use for them will buy them. Collectors who only own tools, but do no work with them, wouldn't touch expansion bits with a 10 foot pole.
yours Scott
