Hi David! Welcome to the club...and we welcome your son as well!
I have about 100 lbs available of dry reef rock (doesn't have any of the nuisance algae, hitch-hikers, etc...but it also doesn't have any of the beneficial bacteria.) I'm asking $2 per pound if you'll take all of it (75-100 lbs...I'm not that picky.) If you want, I can give you some water/sand from my aquarium to help kick-start your aquarium as well.
I'm located in Huber Heights, but I *might* be swinging down that way this weekend.