I know the 660 piston went from $42 to $70 in January. I don't recall the old retail price, but $70 sounds about right.
A lot of the price decreases were short lived. I think OEM did a price drop due to the fact they were losing a lot of market share to aftermarket...
I have a 700 grizzly that I bought new, I love it for hunting, trail riding etc, but it's a pain to use around the house, yard work, brush hauling...