The Fiat G.55 Centauro was perhaps the best they had in this respect. Introduced in 1943, after being benchmarked against the Messerschmitt Bf 109, the plane (of which under 300 examples were ever made in several variants, making it one of the rarest such machines around) served with the Italian Regia Aeronautica, but it would also end up being deployed by the Argentine and Egyptian Air Forces. It faced off over serious opponents, including the British Spitfire or the American Mustang.
The Centauro shown here is of the G.59 variety made in 1950, meaning instead of the stock engine fitted inside these planes, Daimler-made ones, it uses a Rolls-Royce powerplant. Centauro planes, obviously, started being converted this way after the war ended, in 1948 to be precise.
There is no info on whether this particular Centauro saw any action during the war, but we do know it was restored and started flying again in 1992. Apparently one of just two of its kind to still be airworthy, the Centauro is for sale for 1.05 million euros, which would be close to $1.3 million at today’s exchange rates.