[Hampshire] Laser printers ?

I just bought a new colour cartridge for my HP Deskjet and then saw someone
in a discussion group say he'd had his laser printer a long time and buys
new toner once every few years. This set me thinking whether I should switch
to using a black and white laser as 99.9% of my printing is black - my
expensive colour cartridges usually dry up rather than run out.

Does anyone have any experience / recommendation for a laser printer for
home use?

I usually go through a box of 2500 A4 sheets around every 2-3 years.

Russell