After serious thinking newshound wrote :
Six weeks on, the low capacity cartridge is out, at which point I find it
seems to have a "chip" like inkjet ones, nothing third party available, and
cartridge prices vary from £50 for 1300 pages to over £200 for 6k. And
nothing with fast delivery.

I always checked consumable costs, before committing to a purchase.

You cannot beat a used ex-office laser, they sell for peanuts, are
built for hard work and the consumables are silly cheap.