Amazon has the iRobot Roomba i6+ for 549.99.This is the Amazon specific version of the i7+. The i8+ (costco version of the i7+) has gone on sale for $580 and that one has a slightly bigger battery and more accessories but if you want it now, not a bad deal.
https://www.amazon.com/iRobot-Aut…085D45SZF/