They can't actually pay you for blood anymore.. they got rid of paying people in the 80's. You're supposed to donate because you "care". BUT you can find out if certain places will pay you for a Plasma donation (its a part of your blood) and if you go about twice a week you can get around $250 to $280 a month! It will help (that is if they actually pay you.. most organizations will not, but private companies will call ahead before you go so you don't waste a trip). And of course Sperm banks will pay you, but I am not sure how much.