Petstore prices here (for the few that do have live feeders)
Mice range from $1.99 for a pink to $4.99 for an adult
Rats range from $2.99 for a pink to $8.99 for an adult
The ONE place that gets ASF's charges $35.99 EACH!

If your snake prefers ASF's and will take f/t, give American Rodent Supply a call. They carry frozen ASF's at very good prices and shipping is free to certain areas.