Why are pre-war postcards suddenly so popular?

I have to agree with TBob, the same thing happened in the comic book industry. I use to collect comics in high school and the same thing happened to silver and golden age comic books that has happened to prewar baseball cards. The prices have skyrocketed and many avenues of collecting prewar cards are just not open to me because of the prices. Now it is not fair for me to say that it is destroying the industry, but I do think there are people buying these cards and treating them like stock market investments instead of loving baseball and loving the hobby. The same thing happened to comic books in the 1990's when grading books exploded. It drove many comic fans out of the silver age and golden age book collecting game. I can tell you that in the mid 90's when I was in middle school you could buy a Uncanny X-Men #1 for about 150-200.00 dollars. Now one that looks like it was chewed up by a dog goes for about 500.00-750.00 depending on the auction. Just a thought.

TT