I commented earlier, but I don't think it posted. Anyway, the gist of my last post was that my wife took the antique and appraisal course from the Asheford Institute of Antiques, and makes considerably more than $40,000 a year. I don't know the particulars of what's involved with the school, but I know that it's pretty involved since it took my wife almost two years to complete.
I work as a an antique restorer and am thinking of taking the program myself -- as soon as I can find some time! But I know that my wife's decision was based on getting "certified" from a professional organization so that she could do higher-end appraisals - so far so good she says. Might be worth checking out if that's what you're looking to get into.