OK I'll bite on this thread.....
I purchased my 1997 240sx Base Model back in 1999 for $16,000.
Up untill about 2002 the car held value above the $10,000 mark.
Currently, I see S14 Base Models going for $2000... even less... depending on condition.
However... JDM S14 models Imported to the US are selling for well into the $20,000 in stock trim.
How someone builds a car and the materials choosen declare the value... I hate to point fingers but Megan Racing/ Agency Power/ ebay parts/ even down to using different manufactures like having SPL Toe Rod and Kazama Traction Rod is a No-No in my book... keep it all one Brand in a given area.
My Car... the one I have spent over 4 years planning and building with my own sweat and blood, not to mention hard earned cash... even selling myself to gain a possable sponsorship... Not worth $18K?????

You Can Not Build My Car... for $18K!!! I have just in parts... over $45K... most of you will jump out of your seats and bug out, but the truth is... shit adds up fast when you build something the right way... down to the Cusco Bronze Shifter Cap.
You build it cheep.... it sells cheep.
You build it right.... it sells higher.
You build it for you, not to re-sell, or because its the cool new drift car, you don't build to impress girls or some dueshbag on the other end of some internet connection. Build it for YOU, How you want it, keep it forever, and it will be priceless.
I will Not for one second even consider selling my car for anything less then $25,000 in its current (as is) condition!
That is My Opinion!!
-Drew