It'll see a small spike immediately after a death, and then after that it'll be back to normal. So, if you're asking this because you're thinking of holding it and flipping, then flip it the day after.
I'm not so sure it'll increase much over time either, though. If anything, baseball cards will eventually lose their value rather than gain it, as the collectors who like the vintage cards are slowly going to be passing away too, and the demand will go with it. Very few of the young collectors like vintage anymore...they want the refractors and autos and game used and all the hyped prospects. I'm glad I'm one of the few who prefers vintage.
I'm not so sure it'll increase much over time either, though. If anything, baseball cards will eventually lose their value rather than gain it, as the collectors who like the vintage cards are slowly going to be passing away too, and the demand will go with it. Very few of the young collectors like vintage anymore...they want the refractors and autos and game used and all the hyped prospects. I'm glad I'm one of the few who prefers vintage.