What's funny, economically, about this guy is that his investment in floppy disks made roughly a 10x return! "Another thing is that I don’t know what my inventories are worth. I know that ten years ago I bought floppy disks for eight to 12 cents apiece. If I was buying a container of a million disks, I could probably get them for eight cents, but what are they worth today? In the last ten years they’ve gone from ten…
Books with actual increases in value won't be at a thrift store, typically.