Used car value can be very regional so it is better to check local then asking people here that may give you very wrong opinions based on what the car would sell for in their area.
By the looks of things most of the guys are pretty close to the price in you area though. Anyplace from $20K to $22 K seems normal for Orlando. Being a series blue the price would probably be at the upper end of the scale though.
As already said the mods do not add value even if they are ones you would have done yourself. They should be thrown in or removed but I think you would have a tough time convincing the seller that they make the car less valuable.
http://www.autotrader.com/cars-for-s...lando+FL-32803
https://www.cargurus.com/Cars/l-Used...do-d2134_L5167
http://www.edmunds.com/subaru/brz/for-sale/fl/orlando/