Here is another thing to think about. The really cheap 3rd party cartridges, especially re-manufactured, can leak toner into your printer. It is a bear to clean up and to do so, you really need a special vacuum. You don't want to be breathing that stuff in either as it is classified as a 2B carcinogen. In the early 2000's, I had plenty of experience with crappy 3rd party cartridges when I was servicing Lexmark laser printers. There was a family owned pharmacy chain that absolutely refused to use OEM and they bought the cheapest that they could find. The leaked toner would foul up the printers, generating regular service calls. They refused to listen to me about the issue and after I reported them to Lexmark, Lexmark threatened to cancel all the warranties on their printers. My service calls virtually stopped after that.
Personally, I don't print much from my own laser printer so I will buy the OEM so I don't end up with a crappy cartridge and have to clean toner. Especially that I don't have access to that special vacuum any more.