If you're having a go at Evan Jono, then I going to back him up.
In this instance....
....is 100% correct!! ;)
If either of you REALLY want to find out what your cars are worth - Put them on the market!!! I don't mean to sound like a smart arse but thats just how it is.
Another thing you need to except RIGHT NOW about modifying cars Jono is you'll NEVER get back what you spent on them. Its just a fact of life. You don't see (for aguments sake) a KE70 full of A J P S parts go for the average price of a KE70 + the total RRP of all the parts in it do you! You pay the average price of the KE70 + more like 1/4-1/2 of what the A J P S bits cost.
If you don't like this reality then stop modifying your car now and just enjoy it how it is.
Man, I've spent probably close to $20K on my mazda to date...... and I know I'm not going to ever get that back. Yet in the next 10 years I'll probably pour another $10k into it!! You just do it for the love of modding cars.