dave
They have specials all the time. I think when they buy the blems from the factory they have to sign a waiver saying they will only sell outside the US. That way the factory doesn't lose sales. If you notice, all the shipping is priced for the US. Those are string cells and if you look at evergr they offer a lot of different panels that are very close in output but the same number of cells. They match the cells for output and rate the panels accordingly. Less waste, less rejects.
Good panels...good marketing.
I've got sun's site bookmarked, watching for a deal on another inverter.
Bonz