I've Samsung SCX 3201G bought 6 years ago and still running on the starter toner cartridge, I've printed 739 pages so far with it as per the statistic. Printer

I've Samsung SCX 3201G bought 6 years ago and still running on the starter toner cartridge, I've printed 739 pages so far with it as per the statistic. Printer was $180 and new cartridge on HPs website is listed for $85 for standard cartridge with 1500 prints. There are $10 Chinese cartridge available for same printer What do you guys recommend? I am already using it with Pi+Cups. Well the printing issues started appearing when I noticed my pages in printer had a lot of dust, I've no idea of its dust which killed my print quality or 70% used cartridge.