Paid $1500.00 for mine. Gear drive box driven from both ends. Got it home and conditioner did not work. Chain drive with shear bolt. Local ARCO dealer could get parts. Got shear bolts at $3.00 a piece. Mower would not ever get up to speed and it would shear the bolt. Pulled side cover and all bearing were gone plus side cases filled with water. Ordered part manual and operator gude (barely understandable) very vauge.
4 bearings, seals, 1 adj arm, o-rings, gaskets for a cost of $600.00 for this small box of parts. Calls for type-0 simifluid grease at $4.00 pint. Replaced grease with JD cornhead grease at $65.00 per 5 gallon. Could only find blades at ARCO @ $36.00 per set. Was a real pain to replace the bearings. Had to pull off conditioner rollers and found out steel roller was bent. New roller $4000.00. Did NOT get new roller and just put it back together. Doesn't condition very well. I suspect it will wear out the new bearings in a while. When it does I will pull off the rollers and just use it as a cutter, the cutter bar seems to be all right. New disks at ARCO are $65.00 each. Have only cut a few acres with it but it seems to do OK. Kind of babying it so nothing else will break.
Hope this helps. Let me know how you do! Gary