I have around $12,000 including the car. I bought the car with 102,000 miles about 2 years ago. By next spring I’m thinking I’ll have about $14,000 tied up in it. What an expensive hobby. 
1kRR 10,300
4 yr warrenty 570
mods
2bros pipe 470
diablo tires 305 mounted
billet flush mounts 115
undertail 310
alarm 100
frame sliders 75
02 silverado 26k
fipk 225
force II catback 250
2500 into stereo
Tahoe front end 700
eastcoast custom air dam 140
northface guages 90
88 5.0 3,500 in mods and car
hmm… id have to get the calculator out… but its a LOT, I have $10K in just the bolt on turbo kit / fuel system / lines / pumps / etc… this is WITHOUT any $ for drivetrain / transmission / clutch / suspension / exhaust / interior / electronics (boost controllers, etc) / AEM EMS / etc… parts.
Was it worth it? Well the feeling of the car without any tuning on low boost was pretty serious compared to the stock twins that went 11.7, there was not much traction in 1-2 & 1/2 of 3rd gear. Cant wait till the spring tuning / race gas / high boost!
$15.5 for '99 TA 6 spd 14.5k miles
350 headers w/ cat y-pipe
350 cat-back
200 shifter
200 ssra
100 lid
1.5k tunes
30 !cags
hell it was worth that and more just stock :))
After looking through this thread, I decided to go back through all my receipts and add it all up.
In engine mods alone, I have roughly $10,490
Add suspension, small stereo mods, some interior pieces, wheels and tires, it comes to about $12,711.
I paid $5,800 for the car over 3 years ago. :madfawk:
Lots of money.
I bought it for 21K a few years ago.
Came with Borla Cat Back: Free (sort of)
MTI Clear Lid: $130
Pro 5.0 Shifter :$170 (I think)
Total car worth …somewhere near 80 billion 