My post was mostly a joke, figured the last part about not using the right alt would give it away.
But yeah, the price look fair for spare springs, caps, and case even if you can't get it working.
Oops, didn't notice it without the sarcasm switch.
A Model M delivered in the low-$20 range is a good price for anybody who needs a pile of parts. I would not bother trying to convert a terminal to a daily driver unless there was some other compelling reason, such as putting a Model F into regular service.
However, with all the projects going on such as chopping and bolt-modding, I can see things like cases, plates, and springs having value for experimentation and replacement.
Also, a nearly-complete set of keys might come in handy for RIT dyeing projects and interesting color enhancements.