No. You are better off making your own. I have seen many people get screwed over, simply because they hired an "artist" to make them a custom theme, that would only be for use on their site, and then turn around and said theme and .psd file to a higher bidder.
The next think you know, the original person, for whom, the theme was initially intended, ends up being sued, by the second person it was sold to. Not only did they lose, and have to remove the theme, but their reputation is affected because they are accused of ripping, AND they are out of the money that they initially spent for the theme they had created by the person they hired.
Meanwhile, the con artist, gets away with the money they were paid to make the theme, and the person who sued, gets to keep the stolen theme, and gets monetary compensation for legal expenses, and for "pain and suffering and emotional distress" endured from having their theme "stolen" by the person who originally requested it.
This can either be a con, for the "artist" and the person they sold it too, or the artist in question is an imbecile, who doesn't think that this is wrong. It could also be a little of both. Taking the time to learn how to do these things yourself will save you a lot of money, and aggravation later on. That being said, I would NOT pay for someone to make a theme for me, and it is why I will always opt to do it myself.