My dream car ATM:
Buy a Nissan 180sx stock: ~$4000, expensive old cars but so awesome.

Take off the front end and put on a Nissan Silvia S13 front for the best looking combination ever, "Sileighty", "Sil80", better than the original cars: ~$500, can find used S13 front ends everywhere here.

Do the standard modifications (cool paint job, rims, lowered etc): ~$5000, paint and stuff is expensive.

Take out the stuffty SR20DET 4 cylinder stock engine: ~$0, can do it myself.

Put in a beast RB26DETT Inline 6 Twin Turbo: ~$8000 for engine.

Approximately a $18k car, but awesome! jizz
Finished product similar to this:
http://custompinoyrides.com/2011/01/suicidal-luke-wests-rb26dett-powered-nissan-sil80-a-k-a-the-rocket-bunny/But without those annoying wide body mods, and everything would be a different color.