Thank you every one for your suggestions; it will make looking at the bike on Sunday much easier. I found @10lbull tire essay and woo-boy was that a rabbit hole to fall into a 1030pm last night; ended up counting tires and not sheep to fall asleep.
Inspection Checklist:
Tires - Dry rot? Flat Spots? Regardless, old rubber will need to be replaced.
Fuel Lines - Ethanol hates machines. R3s are injected, correct? Are there any fuel lines that I should definitely watch out for?
Leaks - Cam covers, oil drain pan. Is the final drive prone to leakage? Or is it grease?
Engine sound - Coming from Harley's, there was always a slight tick on my Street Glide even when brand new. Are the R3 similiar, or should it be a "tickless" sound?
Tune Up - Professional or DIY? Invoice if Professional.
Again, thank you all!