Or...
10. "May I please see the logbook?" It should have a complete history of the races on the car, perhaps with notes of on-track incidental damage, tech irrgularlities, etc. The logbook number must match the stamped number on the cage, for starters. Check for tech stickers on the car as well, to see if they match the info in the log book, and be sure that no pages have been removed from the book itself.
11. "Do you have any written set-up, parts life or maintenance records for the car?" Stuff in the current owner's head is useless but written notes are helpful to you as well as indicative of the care that the car has had in the past.
12. "Do you have copies of qualifying or results from races run?" A lot of racers hang onto results sheets - if they are reasonably happy with them. This would help answer the "how competitive is it?" question.
13. "Are the receipts for any parts purchased available?" In addition to providing some indication of what was spent on the car, it is REALLY useful to be able to go back to the original retailers for replacement parts, specs, advice and so forth. Also helps paint a picture of service on the car.
14. Check the date on the belts and see if it has a full fire system and cage that meets the new diagonal requirement. If not, consider the cost of fixing these critical items in the price.
Beyond this, it is like buying any used car, starting with cleanliness. A crappy race car is not likely to be a well-cared-for race car, quite frankly. Also, be aware that the stuff that gets called "spares" is often baskets full of broken and/or used up junk. Don't let this factor sway your judgement.
Get someone who KNOWS Hondas to go with you to look at it, to be sure that it is all there and correct. If you get it home and find out that it has the wrong transmission and brakes in it, you face (more) bills. If it is illustrated online somewhere, let all of your IT.com pals know and we will scope it out for you, or take digi pix and post them so we can all give it the critical eye...
My cynical advice is to try to arrange to hang out with someone while they are still running a car that you are interested in and then pick it up at the track, right after they finish their last race with it. That way you know you are getting the real deal.
Kirk