I bought a £250 Brother all in one laser printer.
A set of toners is £250
I bought a non-Brother set. They didn't work. It was too late to send them back.
The printer recognises they were not Brother so it's now a brick.
I could get Brother's official service contractor person round, if I had a new set of toners, who says he could get it going. He says they wouldn't have to be Brother, but some clone inks don't even fit.
One tip, if you want to go the clone ink route, NEVER update the printer's software. Doing that made it stop.
Another Brother? No chance.
Cheap Canon inkjets have been ok on clone ink, but the last one had a print counter. It's fake, it declares the Waste Ink Tank full so that's it, no more printing, making another brick. People have stripped them down and cleaned out the WIT, which doesn't work.