Yep, those are good! Other questions I have on my question list:
Why are you selling the horse?
What's the horses temperment?
What's the horse like in traffic?
Does it load,clip, bathe, and stand good for farrier and vet?
Has it ever been shown before?
What's she like in heat (if it's a mare)?
There are tons and tons and tons of questions you could ask.
:p :p