I would love to see some pics or a shooting video... sounds awesome.
As depressing as it sounds, resale value on highly up'd Mini's is less than ideal. My best estimate would have to be around 350$. If I were you, I'd list it on eBay with a high reserve and see what happens. eBay tends to pay more for up'd Mini's than we do.
Also, even though the rule is geared more towards beginners, appraisal threads are not allowed in this forum. Just a little note for next time