You can get new cartridges for about $90 for 5 cartridges from Mark’s Marine Pharmacy in Canada. And then empty them yourself by using them.
$18 per cartridge, and full of insulin. You probably won’t be able to beat that deal.
When you talk to Mark’s, just specify you want the cartridges for the Lilly Huma pen, not the Lilly KwikPen. Those guys will hook you up.