New Holland 615 disc mower

Hey all. Looking at my first disc mower. A NH 615. Looks to be in reasonable condition. Has been reconditioned a while back. I am currently looking for a manual online which I will get if I get the mower. Is there anything I should be specifically looking for on this model? Also what age would these units be? And, are parts still available? I can still get gear for my NH square baler so I figure I should be able to with this unit. Thanks for any info.

New Holland 615 disc mower