These days HP Laser jet 1018 printer is most popularly used by professionals. Its quality of printing is amazing and one cartridge can print up to six thousand pages clearly which is probably very rare among all types of printers.
It costs around Rupees 7000/- and is readily available in shops everywhere. Its maintenance is also quite convenient if bought from a local store.
Even, the cartridges can also be re filled under the maintenance service and they do it very quickly. One cartridge can be re filled more than 20 times and still the print quality remains as if a new one.