I'm probably a 3 or 4.
Body-wise, at my best I top out at 6 or 7, but could probably reach 8 or 9 if I tried to put on muscle for looks rather than for 5k ability. Not sure, I've never tried.
Face-wise I'm fairly ugly, with a tall face, ever-growing nose, bad skin (acne and acne scars), and inability to grow nice-looking facial hair (it's patchy to where if I grow it out it only ever makes me look like a pedophile). I don't put any work into my hair, either.
If I really took good care of my skin for a year (maybe I'd have to get surgery?), started getting haircuts every month or more instead of every 4-6 months (I look mullety and slobbish pretty quick), and stayed clean-shaven, I could possibly max out at 6 or MAYBE 7 in that department.
Face attractiveness is probably a heavier factor than body attractiveness, so it would be pretty borderline if I could get to 7. Maybe with a rounding error or two.