It was truly a great car, one of only 17 RHD GT5S and located in the UK (import duties element), all factors which IMO likely played into final sales price.
That said sub $150K late model Pantera's are likely few and far between now.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.