I have always advocated exposure on eBay it is one of the cheapest methods to get your car exposed Worldwide. If it happens to sell then it's a $125 fee. This forum and Chuck's Provamo registry site are other equally good free avenues where potential buyers look.
As for value, despite what some hate to hear there is a softening in the collector car market, that may in part (at least in the US) be due to it being an election year with folks holding on to their money until things settle down. With that and going into winter I'd advocate holding if you can until spring.
Hagerty's valuation tool takes a valid cross section of all recent sales and shows a current $85,000 for an excellent #2 Pantera.
It's entirely up to you whether you use a broker, but IMO a good Pantera priced correctly sells itself and without the broker you can price more 'correctly' without having to take into account a 10% commission.