There's some good size spanners in there that don't look in too bad a condition so I would think that you would easily sell them a few at a time. Give it a go!
Spanners are always useful, a few sacrificial spanners to alter for other uses come in handy. I even made one into a sprocket holder for tightening gearbox sprockets once.
Don't bin them. Sometimes an open end spanner is the only thing that will do. Here's the one for the rear hub nut of a pre war Austin Seven; you'd need a 4" or more deep socket to reach across to the skinny nut that retains the hub inner.
Auto jumble was yesterday (sunday). No interest in the spanners until the end of the day. Sold with chest for £15. Buyer said they will be cleaned up for 'decorative use.' I think the chest was what he really wanted. Will be awhile before I make a million.
I bought one once, a 1/4BSW for a quid. In fact, a year ago. I needed one that I could grind down to fit in a particular gap and wasn't going to do that to one of my sets of spanners!
old spanners, files and tools in general are an excellent source of tool steel, they can be heated, softened, worked into shape , then hardened and tempered for use! That is why they used to be chucked under the bench in an old box when they are of no further use in the shape that they are in! For making tools you need a steel that can be softened and rehardened again, that is all! There may be better, and slightly more suitable blends of expensivium and unobtainium available somewhere if you have the time to find them and the money to buy them, but generally, try it and see!
Phil
I bought 3 for £1 last Thursday, two fitted the quill on the mill so I am a happy bunny. One new 6" file, new 10mm SKF tap also in the 3 /£ box came home with me.
Wife bought a box of plasters which apart from the file is the only thing we have used so far - on my thumb!