I stopped by a little shop that does gravemarkers. I told the guy at the desk who I was, what I was looking for, and what I was gonna use it for. The man walk me out back and asked "will this do"(as he pointed to a piece of granite that was 15"x20"x4")? I told the nice man yes. He told me that I could take it off of his hands for $25. So I reach into my pocket for my cash and low and behold no $5 bill, so I asked him if $30 would be ok, and of course he said yes.
Unfortunatley this little place has no parking lot and is on a busy road, so the closest place I could park was about 100 yards away. Lets just say that with carrying an 85lb piece of stone, that distance, I think I got my exercise for the week. That's ok, I needed it(the exercise and stone) and it was worth it.
Thanks alot for the tip mogwild.