but until you know what's stored inside it
for all we know he or she could have hundreds of health unused to sell
then we honestly can't make a decent decision
First, we do know exactly what he has to sell, because he listed it in the offer.
Second, even if he had hundreds of EoRs couldn't get this character anywhere near stats in the 300-600 range. And, even if it could, it would still be barely half the level of the top people, and therefore die quickly in any battle.
For someone who wants to come to W1 and work hard for a long time to become competitive, obviously starting with a level-33 account is better than starting from scratch, so it's worth _something_. (Dradaki and Underground would surely say otherwise, but fortunately they don't play here.

) But calling it a "good account" is a stretch.