imo, i think $15k-16K is too high.
$4k into it doesn't mean $4K out of it.
I'm not sure how many offers you'd get on it with that price, especially with Simon (fst4dr) selling his in the classifieds for $10,500 obo...
Please don't take it the wrong way - I just think $15-16K is too much. I think you'd be better off offering $12K max.
Hopefully someone from around here would purchase it to avoid hassle with out of state purchases.
Also - another thing would be add up TMV of a stock SVT in the conditon of your car and the mods to the car (not including labor) then come to a decision from there. I would say cut the value of the mods in half and add it to the TMV and see where you end up.
just my $.02
btw - DON'T SELL IT!