I think the cheapest IPELA camera starts at $300, prices run into the thousands.
Sony has done the responsible thing, is offering free firmware updates for all owners of IPELA Engine cameras, even without an an active support contract. Hopefully this time they’ve hidden the backdoors better, the debug user’s password was “popeyeConnection” but the primana account password is “primana”.
The various “white label” and small importer cameras will offer a vulnerability for years to come, very few vendors come out and say who the real maker is of their cameras, and generally don’t publish firmware updates on their websites, and won’t warranty your camera if you install a “generic” update.