Robyn, I got mine at Dick's Sporting Goods too. It was a 110 lb. plate set with a barbell (15 lbs) and 2 adjustable dumbbells. I really like those. I have 5s, 8s and 10s (regular dumbbells) and now I can make 15s, 20s, 25s, or whatever I need without having all those single sets sitting around.
I don't remember the price of the set but it was pretty reasonable (on sale).