I agree with Jason's assesment of value- errors are collected by type, not year. While it may be unique as a 1969-D, it's not unique as an error type. Nearly all errors are unique, simply because they're not created in a cookie-cutter fashion as die varieties are. In fact, that there are other examples of the same doubled die are what makes them "collectible".

While fun and demonstrative, I believe this coin would have a difficult time realizing over $100 in an auction.