In general, I'd say it looks ok because seller has decent feedback and the price sounds about right- Lifestyle had a midnight sale on not too long ago and P1 12" was $99 (usual price is $149).

I personally had the old RF P1 and that wasn't too good as I felt it sounded right but was never 'oomph' which is what I wanted... but within a month I had switched to a P2 (which has slightly better specs; IIRC it's 200w RMS) which was definitely good enough for my needs and I still use it today with a 4ch RF amp outputting 100w per chan.