No, Theo, it's better than mine. The Siebert boys used more uprated parts when building this car. I have never seen this car in the flesh, but always liked their approach: to take part in rallyes with a car that's not a winner, just for the fun of it.
Better than mine: This car has a Heigo roll cage, Bimarco bucket seats, 6-point belts, polycarbonate windows, coil overs, adjustable shocks, Argenta panhard rod, headers, 100-cell racing catalytic converter, Diesel clutch, front brakes 257mm with Tipo 16V calipers. Head, pistons are same than mine, carbs are 44 instead of 40IDF. One advantage my car has, however: I do have FIA papers, they don't (presumably because they used too many non-contemporary parts).
The asking price is fair, especially considering the fact that the car comes with a van full of spare parts and is street legal. If I were looking for a 131 rallye car, this would be my choice.