We know that the convertible you'd rather have is a McLaren MP4-12C Spider, but you don't have $268,250. You also can't muster $105,500 for a Mercedes SL-Class, or even $50,400 for a Porsche Boxster. 

You can get a good used Miata for less than $10,000 or a brand new one for just $23,720. Alternatively, you could spend that on a Toyota Camry; it's your call.