Remember that a cheap laser printer really consists of a toner cartridge with a free printer thrown in. When it comes to replace the cartridge, it will be touch-and-go whether its better value to just buy a new printer.
Yes, third-party and recycled/refilled cartridges may be cheaper than the official cartridges - but they're still not cheap.
Probably, the previous owner has just printed a few pages before returning it, but if they have used a significant amount of toner they've also used up a significant part of the value.
The toner for that printer lists at $64, just about 1/4 the MSRP of the printer IF they include a full-capacity toner with the printer (some don't). I will say HP's LaserJet units are SOLID. I work at a large office campus that had over 450 units around the facility and it's VERY rarely that we had to call HP in to repair one. That said, none were in the same class as the MFP linked in the OP but HP makes some of the better small/medium network printers out there from what I saw. I wouldn't lump a $220 (MSRP) laser printer in the "do I junk it for a new printer or buy a new toner" category when the MSRP of the toner is $64.
BTW, Lexmark makes some of the WORST. They make (or were but it may have changed) Dell's laser printers, we had to service the 5-10 of those we got more than any of the HPs.
As for the 3rd-party/recycled toner, DON'T GO THERE! While it may save money up front, you risk print quality and overall longevity of the printing device and it WILL cost more in the long run. I had to replace one on an HP because of a line down the print outs. Through troubleshooting, it was determined the black cartridge was causing the problem, swapped in a new HP one and the prints cleared right up. The 3rd-party cartridge was only ~10% consumed, waste of money. HP has a cartridge recycling program, they usually include a label in the box with new HP cartridges. They grind them up and make new ones from the recycled plastic. (
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@TH55 , if you're THAT interested in the unit, B&H should be more than happy to print out a config page for the printer, it'll show the number of cycles. If they do that, they can also print a supplies status page showing how much toner is left. They could then scan those and email them to you.