I personally would pitch the rodents, but I prefer to act with an abundance of care. Plenty of folks would choose to freeze and reuse.
I typically order 3 months worth of prey at a time so that I can change prey size as needed for growing hatchlings. When I had a large collection (42) of mostly adult animals, I ordered 6 months at a time. I prefer to vacuum seal my rodents in smaller portion sizes to prevent freezer burn. In just regular ziplock bags, you can probably get 4-6 months.