CARDS QUESTION!!!!!!!?

i want to sell my card collection. it is a mix of nfl nhl nba wwe nascar and baseball cards i have about 5,300 cards there is some great cards such as peyton manning rookie card and jerome bettis rookie card moss rookie card i have some wayne gretzky cards o man i have jerry rice marino favre bond a rod you name it i have it what do you think would be a reasonable price to ask?