Not really a hair brained idea!!! You're thinking of the "angles", and some day, it will pay off.
I don't know where you live, but check out yard sales for electronic gear. Learn, with research, to spot the few gems, buried in a sea of used turds! You'd be surprised what some people, who know nothing about audio, will let that old clunker go for...but you will know better!!! A quick check, a minor clean-up, and some few minor repairs can net quite a profit here on Agon or eBay [depending upon how good your find was].