newswatcher, isn't BlueDiamond needing info on Laser Printers.
Things I look out for is the replacement of consumables, in this case toner cartridges.
Toner cartridges will come in different sizes for the different make of printer, you will have to get more info on this to help guage how many pages at a set coverage the printer can print. You will then need to get prices for the replacement toner cartridge then weigh up what is the cheapest.
One other thing to ask is how old is the printer. Companies tend to sell off printers when new models come onto the market. Old printers will tend to have more 'limited tech support life' than a new model. So it may be false economy buying a cheap printer only to find that in the near future you cannot get help if things go wrong.