I have about 5000 older cards, 70'-90's, mostly baseball, there are a few football and hockey cards. Fleer, Topps, Donruss, UpperDeck. Plenty of big names, rookie cards, and lots of random cards.

Would it be in my best interest to sell them as a whole, split them up into smaller lots, sell them singley, on eBay or at a card store, and any idea at how much I am looking at (rough estimate)