I'm glad my LaserJet 1020 just keeps working and working. For infrequent printing it's just perfect. I always get the cheapest refill from Amazon and it's doing just fine. One refill lasts about two years and is 15€. The last two times I ordered the seller even included a note that if I'd give them a positive rating I'd get another one for free. Didn't do it cause I'm lazy.
What a great printer! My 1020 finally died after my kids knocked it off its stand too many times. I replaced it with a "HP LaserJet Pro M15w Wireless Laser Printer" and am very happy with it. The included toner ran out quickly, but a 3rd party replacement cartridge from SwiftInk works just fine.