let me put it this way, diadems seem to sit for ever for sale on MCB...and they only sell for about 100-150.00.
Yours sounds awesome. you might could get 100-150 for your sentinel. And only on mcarterbrown. These 10yr olds here have no clue what a sentinel even is! So sad! Good Luck.
BLAST is best.
Don't ask what color, their all dust black