I would have to only ask why ?, maybe for a conversation piece but anything Over face would be a bad investment, as it would be very tough to even get Your money back, but its your money...LOL
There are folks who collect barbed wire, bottle caps, marbles, and a plethora of other things that have what most of us would consider no investment value either. Yet some people buy those items. I'll ask you, why? FYI, I didn't say I'd buy the OP'ers notes. What I won't say is nobody else should buy them. That's their perogative.....and their money
Iam all for collecting what you want, and spending money as you see fit However with that said, if your looking at overall value and resale it would Be something to think about, your money your choice.