Need Advice: Collecting Vintage Postcards

[GregMitch34]

I can certainly appreciate the "don't really care" if price goes up or down view but some of us have limited funds and at least like to have some idea about value before plunging into this. I never buy anything with aim to re-sell but on the other hand I can't afford to be cavalier about that. I posted this thread to try to find out in this strange new world (to me) of post carding, where there seem to be few graded cards, no price guides etc., if it's fairly easy to 1) judge what's a decent price to pay and 2) if you can sell cards at a decent price--if you have to some day. In other words: How different is this from collecting vintage baseball cards? Yes, I sometimes adhere to if-you-like-it-buy-it but more often have to keep at least one eye on enduring value...