But its still the same with buying anything,
I collect rare records. Say theres only a handful of copies of a particular record. Its a very good record that all the top Djs and collectors want.
It was found in a dusty old basement and whem it was printed the record company thought it was shit at the time so only made a few demo copies.
I found 8 copies of this record that cost 50 US cents each but because NOW its so good, rare and wanted I can sell them for £1k each.
Everything is worth just what the market says it is and how much someone is willing to pay.