I believe each pod costs about £20, unlike other pumps where you change just the cartridge and cannula with those the pod is the pump
i don't think you can purchase one either without a private prescription for it, but you could email insulet and ask these details.. they will even send you a free (non working) sample
When I was using it about 5 years ago, I think the handset was £400, and each pod was £20. The hospital were ultra strict that you could only have 10 pods a month because of the cost, so if one was painful, but still working ok, you had to grin and bear it.