Is my new Nexus 7 actually a refurb?

I picked up a Nexus 7 32GB over the weekend from Staples for $170. After unlocking the bootloader with WUG's Nexus Root Toolkit I tried rooting the Nexus 7 and got the following message:

A pretty clear indication to me somebody has had this tablet in their hands before me, and flashed a custom recovery, although the OTA update from 4.2.1 to 4.2.2 successfully applied prior to any of this. Am I wrong about this having been in someone else's hands?

 

To confirm my suspicion, I tried booting into recovery by holding down both volume keys while powering on, then selected recovery, and it gets stuck on the android with a red triangle and exclamation mark (which I've read reports of with regard to TWRP recovery). At that point, I held the power button and pressed volume up and got the attached screen. I see no mention of TWRP. Is this the stock recovery?

 

I think you're right. IIRC, the toolkit uses an alternate recovery (without flashing it) as part of the rooting process. It appears that TWRP is the recovery it uses for this, but this still seems a little odd since the toolkit offers to flash Clockworkmod recovery during the rooting process, with no option to flash TWRP.

 

My mistake... the options screen does offer the choice of TWRP or Clockworkmod or a user-supplied recovery image, as well as a choice of Super SU (Chainfire) or Superuser (Koush). Since I didn't want to flash a non-stock recovery, I can't elaborate on that, but I did choose Superuser over the default Super SU, and the rooting process went without a hitch.