If you are buying crickets from Petco, you are spending way too much money! The Petco near me sells crickets for 10-11 cents a piece. Crazy! If you order online, you get quality crickets, first off, and you can bring the cost down to 2 cents a piece. I order thru a reptile shop who orders bulk for customers and get 1000 crix for $19.
Second, you can get a small cricket keeper that works well for small amounts of crickets. This gives you some floor space to provide your feeders with nutrients. Remember, if you don't gutload your feeders, you are just feeding your beardie more shell then the feeder is worth.
Look into some threads about ordering feeders and I don't think you'll be disappointed.
How old is your beardie and how many does he eat a day?