I have had a LJ4+ and upsized to a 4V (A3 or 11"x17" for you).
When you do a lot of printing in B&W you can't go past a laser for cost per page.
Be cautious about buying a cheap refilled toner as sometimes the older printers have a bit of wear in the gears and don't like the cartridge.
Not sure what the price for the toner is in the US but here in Aus a remanfactured toner good for 4000 odd pages costs around Au$80 or US$60.
It can be worth taking these old printers apart and giving them a good cleanout especially the rubber rollers.
I have heard of someone putting all the plastic components in the dishwasher
came up a treat!
MAx