Kinda depends how close to a dealer you are. Here's a couple odd ball parts that might go. One thing we keep a spare of is the concave adjustment motor. Not sure why but they seem to stop working extremely prematurely. Another non traditional part that might come in handy is an extra rotor vein or two. Seen the 10 and 20 series go through a few and were a bit hard to source during the crunch time of harvest.