There is also a few threads on the P12 on the Gateway to Airguns forum.
It's a relatively cheap single shot air gun made in China. The America seller offers a bunch of upgrades to bring it up to scratch like LW barrels, a multi-shot breach that uses Marauder mags and different stock coatings etc.
You should also check out the Jkhan bullpup. Works out a little cheaper as it is multi-shot with an LW barrel from the factory starting at $800.
There is also the new Hatsan Gladius bullpup to consider in that price range.