As of 2015, the average price for a Porsche 911 on eBay ranges from $14,000 to $106,500, depending on its year of manufacture, model and the current market pricing. The Porsche 911 has undergone various significant refining and many small niche tunings over the years since the 1950s.
The improvements come with great price variations. A 1978-1983 model being the lowest priced at between $14,000 to $18,000, 1965-1977 Porsche has a price range of between $26,000 to $38,500. It has a maximum power of 88hp to 234ph. Compared to the 1994-1997 Porsche model whose price range is between $51,500 to $106,500, there were major improvements to the latter, hence the big difference in prices. The 1994-1997 model has a maximum power of 270hp to 424hp, has wider rear wheel arches, and reduced oversteer, allowing for a quieter and more comfortable ride, among many other improvements.