If you're interested in retro audio gear...
I recommend taking a look at Techmoan on YouTube. Lovely anorakky sort of bloke - takes apart and inspects all kinds of weird and wonderful audio/visual kit from the miscellaneous format wars of the ages. He even plays samples recorded from defunct audio formats, so if you were ever in doubt as to whether to revive that obscure 1980s Japanese mini tape recorder (with 5(!) albums available), you can be safe in the knowledge that you're better off saving your money for another stupid eBay purchase.