I don't think there is such a thing.
You are expecting to get a workhorse for the price of a lapdog. Getting an "old workhorse" also won't solve the problem as very often the fuser or the laser unit might give up on you simply because of their age and not their page count. (In case of the fuser, also because of the page count.)
I'm speaking from experience, I've had a LaserJet IIIp, LaserJet III, and a LaserWriter IINTX (the latter two shared the same mechanics). If you really want a workhorse printer, take a look at Kyocera, the printers are made to last, because some of the more important parts are made of ceramics. But you'd have to double your money (roughly), but you'll get a new, faster, and relatively good printer.