I personally try to avoid terms like "mint" "like new" "excellent" and use "wow" & "nice", and "very nice" if they are very nice lol Looking at the pictures (and pictures of shoes always look better then in person if done correct and you seem to do them correct), they do look pretty mint to me. That said, you accept returns so you'r going to have to take them back either way.
I pay for a photobucket pro account the last 2 years.... I could prob use my own website server but photobucket is not that expensive and works good
Its also free for the most part unless you get into a large amount of bandwith over 100's of listings a month. Not sure what your bandwith usage is