UPS and Newegg say it was transferred to USPS on December 1st. I would believe that because I personally have had items that I ship but they don't update for a couple days, and I bought a video card from someone on here who has a security image of him handing it to a courier and USPS again not updating for days.It looks like it was in limbo between Dec 2nd and Dec 8th when UPS said it left their facility and was on the way to the USPS facility... ... following the tracking info it appears that USPS only had it for 1 day before attempting to deliver it... and the rest of the time was with UPS or lost by UPS...I would find it hard to blame USPS when it could have been UPS that dropped the ball...
https://tools.usps.com/go/TrackConfirmAction?qtc_tLabels1=92748902410638553507218089