Just putting it out there, it is thrilling to get a deal, and the anticipation of it shipping is one of the best parts.
But just like not buying a Woot BoC this week because maybe it'd come on Pesach and maybe it'd have chometz, think of how much we spend and work to keep Pesach, and is it really worth a risk to that for a deal?
Of course talk to your rav and maybe it's totally fine to get on Pesach or by accident or whatever you and your rav decide, but just throwing out my $0.02 with some perspective.
(Not talking to anyone specifically!)