I wasn't sure if the 29er medium would fit my wife so I ended up submitting a offer earlier tonight for the 27.5 which was accepted. I noticed once they accepted the offer the inventory went down by one and after I purchased it the inventory did not change. Might be helpful to anyone on the fence with only one remaining. It seems they hold the bike and you're technically obligated to buy If they accept the offer but they don't enforce it other than giving one warning. That said they are not open on Sunday so I doubt an offer is going to go through the approval process before the bikes sell out.
That's awesome that your HT came with the PW-SE. Maybe as they got to the bottom of the stack they got to newer inventory..
A friend also gave the order tonight and after he made the purchase I guess he got the last 27.5er.