Mono laser printers start at under £100 and the entry-level model in Brother's range is the HL-2130, which can be had for only a tad more than £80. For this, you get a basic, but very serviceable personal laser for the home or small office.
Fast print for class; Linux driver link from setup app; 250-sheet paper tray and multi-purpose slot
Quite pricey to run; compared with rivals; Blotchy greyscale print; Hard to distinguish mid-grey tones