Depends on where you do your checkride. In South Florida, one can expect to pay ~$500 per checkride. It's also quite possible to make a small fortune as a DPE, as you can normally do 2 checkrides per day.
I know a guy who's all but quit his day job, because as a DPE, his income exceeds that of the your typical widebody major airline captain- and he never has to do an overnight.
Sweet gig!