Although it launched the Gallardo->ke375 in 2003, it took Lamborghini->ke44 three years to develop a convertible->ke144 version of its entry-level supercar.->ke177 However, the 2006 Lamborghini Gallardo Spyder wasn't the first drop-top iteration of the model. Before it, it came the 2006 Lamborghini Concept S, a show car that featured a divided cabin layout with separate windscreens. It was a modern interpretation of the single-seat roadsters of the 1950s and Lamborghini was rumored to build 100 units for select customers.

The Italians eventually decided to keep it as a styling exercise and came up with the less radical Gallardo Spyder. After 10 years, the Concept S is up for grabs via RM Auctions. The concept car->ke169 will cross the auction block on November 18th, 2015, in New York. As it is with such vehicles, the Concept S is in tip-top condition and fully operable. What's more, it's also street-legal and it has been driven for only 112 miles.

There's no estimate as to how much it's expected to fetch, but considering we're talking about a one-off factory vehicle in mint condition, it should change owners for at least two million bucks. The auction is still four months away, but we'll be back with the result as soon as the hammer goes down. Stay tuned!

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Why it matters

With the Gallardo out of production for two years now, several limited-edition versions -- such as the Superleggera and Balboni editions -- are already gaining value on the used car market. The Concept S, however, tops them all as the only true-blue, one-off vehicle wearing the Gallardo badge. The fact that it has been driven for a little over 100 miles and its street-legal status make it that much more desirable. There's no doubt that this concept car will attract a lot of attention from collectors, which should translate into impressive bids.

2006 Lamborghini Concept S

Read more about the Lamborghini Concept S here.