A CLEAN TITLE AND ASSOCIATED PAPERWORK (bill of sale and application for title signed by the OWNER...not just a title signed 10 yrs and 3 owners ago

) Whatever is required in your state.
After that.....Depends where your skills lay.
If you can paint... well then color or paint condition doesn't matter. Paints cheap it just takes time.
I'd say original and unmolested counts for most.
I hate tracking down parts. I hate Mod's. You can keep your windjammer fairing, sissy bar, luggage, ape hanger bars...they add nothing to the value.
Some new Parts I can order but the discontinued and unavailable stuff (like some exhausts) will drive ya nuts. Some of them get expensive.
I hate fixing other peoples shoddy work. Fix it right or please...don't make it worse. An example would be chopped up electricals.
I prefer to know the history. Also helps if it runs or you know beyond a certainty why it doesn't.
Frame condition counts as well...if its rusted and ugly...well thats a complete tear down.
As for spokes I can replace a set in about a day so that is not a concern.
Tire condition? Unless they have a pretty recent manufacture date and are in good condition I replace them
If its sat for any period without regular use...the carbs are going to have some problem. Clogged, leaking, out of sync/ adjustment, corrosion in carbs/fuel tank or some combination there of. (sometimes its all of them)

I don't worry about valid inspection.
Now that bike in the ad looks like it would fit the bill with the exception of the exhausts. Get some info on the mechanicals and what its status is mechanically