As far as pricing goes you can get a relatively newer model with less than 100k in the 20k-25k,for 25k-28k you can get 2007 and 08 models. If however you are looking maybe lower than 20k maybe something like this would be a possibility. Found this one near you and its a convertible.
2005 Nissan 350Z Touring, $18,489 - Cars.com