Samsung makes printers that use cartridges that are relatively easy and economical to refill (after a onetime 7USD purchase of a program to customize the printer's firmware). I use both the 1660 and 2165 black an white laser printers. I refill a toner cartridge about four times before I buy a new one and repeat the cycle. Each toner refill is about 15 QR, depending on where you buy the toner. I'm still using my toner purchased from Kalon in Dragonmart-Dubai, so I am not sure if it is possible to buy the same in Doha, though you can purchase what you need through AliExpress. Perhaps, Dragonmart-Doha will have a Kalon shop in six months to a year, when Dragonmart should be filled with more retailers. You also might be able to contact Kalon in Dubai to see if they have any connection to a shop in Doha. I can dig up the phone number and email address, if you are interested.
Samsung makes printers that use cartridges that are relatively easy and economical to refill (after a onetime 7USD purchase of a program to customize the printer's firmware). I use both the 1660 and 2165 black an white laser printers. I refill a toner cartridge about four times before I buy a new one and repeat the cycle. Each toner refill is about 15 QR, depending on where you buy the toner. I'm still using my toner purchased from Kalon in Dragonmart-Dubai, so I am not sure if it is possible to buy the same in Doha, though you can purchase what you need through AliExpress. Perhaps, Dragonmart-Doha will have a Kalon shop in six months to a year, when Dragonmart should be filled with more retailers. You also might be able to contact Kalon in Dubai to see if they have any connection to a shop in Doha. I can dig up the phone number and email address, if you are interested.