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Ford Shelby-Gt500 vs Porsche Boxster: 5-year value retention (58% vs 56%), resale value, and cost of ownership head-to-head. Ford Shelby-Gt500 holds its value better.
On five-year value retention the Ford Shelby-Gt500 comes out ahead, holding about 58% of its value versus 56% for the Porsche Boxster. Over the first five years the Ford Shelby-Gt500 loses roughly $23,075 while the Porsche Boxster loses about $14,486 — a gap near $-8589.
First-year drop is the biggest factor: the Ford Shelby-Gt500 sheds about 1% in year one versus 12% for the Porsche Boxster. If you buy used, the steeper early drop is what the original owner absorbs.