I just did a blackbook online value estimator on a VW dealer website for my X.
They give a range of values, anywhere from 3k-$9500 in great condition, 2003 3.0i with 68,000 miles. I'm sure having the manual transmission would kill a trade in anywhere, that's why I'm keeping the X for a long time
Definitely don't think I'd get top dollar trading in, someday when I do sell I most likely will do it privately, or by the time its time to sell it will be worth so little that I won't even care about trading in!