u/Fit_Advantage_3080

I'm looking into a few models of the Roborock. I have both Costco and Sam's memberships and am wondering what the best price people have seen for the Qrevo S5V (currently $599 on Roborock's site) or the QV 35S ($549). I can wait to purchase if it goes on sale during certain times. I would prefer purchasing through Costco because of their return policy but their version of the QX Revo Plus doesn't have the side arm for mopping - which I really want.