The interest in this gal fluctuates.
I've sold two, loose, in the past year. The first one didn't have her original nightgown, but a dress I "stole" from a non-Animator release toddler. It sold for $150ish, but the person never paid. I held on to it until this past December, when it sold for $221.02 (lol).
I sold one earlier this month with "issues" (torn nightgown, arms that easily fall off) for $175.
The MIB Rapunzels are few & far between, and I noticed them running in the $500 range. The $800 auction ended in December (when I am assuming people were going a little wild with holiday spending).
I think, if you're willing to wait for the right person to come along, someone will give you $1,000...but you may have to wait until next December