Often I look at all I have learned when evaluating the time spent on an old bike. Like how to remove seat posts, stems, cranks, bottom brackets and such. And the mistakes... Gee... Lets not mention the mistakes. I am even building wheels now, reluctantly at first, but now much more easier. Of course I couldn't make a living at it. And honestly I don't see how some bike shops do.

So... Time spent on resurrecting an old wheel set can be worth it even if ya don't use it. And a spare wheel set can be a real gem...