chico513,
GotoGroupBuy does not actually set any of the prices: we're just a site for listing group buys.
I will transfer this group buy over to EZCarlift once we get enough Interested buyers on the list. They will then set the price for the group buy. In the past, they have set up a pricing structure that gets cheaper as more people Commit to the group buy.
As far as warranty info goes, I've emailed EZCarlift and will post that info asap.
Thanks,
Andrew