I've never started out on any site with any level of complexity (such as selling sites) where I have a got the hang of it within a couple of hours - and I like to think I am reasonably educated (some here may disagree with that) and computer literate. That's why I say that someone who throws is the towel within a couple of hours is not worth bothering with; they are either too inflexible to make the site work for them or they only came on to put the site down (it probably took them most of their time here to figure out how to leave a message on forums saying the site is a mess).
Just sorry that I never got the time to wave them goodbye.