When I look at the ROFR thread, this is all I find reported ROFR'd recently:
Only one other contract has been ROFR'd this year -- a BCV contract back in February 2011.
I wouldn't call that a trend that indicates
"...DVC is starting ROFR more often now." To me, they ROFR'd one contract in February and two in July out of thousands of resales.
That said, my guess is that $55 is too low, but you'll never know until you try. They have passed AKV contracts in the high $60's, but we won't know what they'd do with a lower price until someone submits such a deal.