I mean, go for it. Do you really want to risk getting stuck with a $1100 device that you have to now offload (and pay the associated fees)?
The corollary to this lottery will ensure that people who want Steam Machines day 1 actually get them at cost. So not only does this negatively impact the supply-side of scalping, but it also impacts the demand-side.
That risk is exactly what scalpers have been carrying at everyone of these cases.