Miata is always the answer. If you are in the market for an affordable sports car, the Mazda MX-5 Miata should always be on your shopping list. The Miata spans four generations starting in 1989, from NA to the current ND. Each one features a relatively lower power four-cylinder engine (with a turbocharged Mazdaspeed model in the NB generation) but with very little weight to haul around.
Though the convertible body style makes the Miata somewhat compromised for track purposes, that can be fixed with the addition of a roll cage, and other performance upgrades are easy to find. Since Mazda has been building the Miata for so long, there are many to choose from, starting at around $6,000 to $7,000 and going up from there. There has never been a “bad” Miata, but we suggest opting for the original NA model before prices rise. We found nice NA examples ranging from $12,000 to $20,000.