Which Monks? The older style "string" point nozzle is different than the newer ones that are either smaller scale or stringless. The older ones are robust, the pump diaphram will eventually have to be replaced, you need to make sure the machine was not abused by back water into the pump, running the machine if you know how it is supposed to operate should reveal the latter--the pump will not have proper suction. I had mine, the more current Omni, revamped by the guy who does the LOC and archival machines in the US. I also put some silicon washers between any metal screws on the top plate to minimize rusting. There’s a "good practices" for running these, I was shown how, and adapted to my own needs. I love the damn thing, have had old VPI and still have the KL. Good luck.
PS: on buying records, hard to evaluate X number for Y price blindly. There are records and then there are records. Do you know what his pile consists of? Era, labels, particular performances, bands, pressings? Condition is of course a factor. Pennies on the dollar for dross; more for collectibles or desirable pressings. Need more granularity but that is often at odds with size of collection and price. Triage it.
