G'day Will.
Just a thought... If you swap most of performance parts to OEM with cash adjustment your way you could easily get 3.5-4K. If you drop the price ot your car by 3K it will be the cheapest in Australia so gone pretty quickly I imagine. A bit of fuss over parts off/on, but given the time this car was on sale you might wanna give it a shot... Your call, just an idea that could possibly work if you are willing to take a risk. Good luck with your sale!!!