For myself, I might practice animation w/ it.... I'll model some scene and make it race around, or what not.. Prolly not, cause animation takes ages to render, and it's not like I car share them on dail-up .. just a 8sec long clip is like 1mb or close, depending on LOD.. o.O
On another note, me and another 3D modeler was looking at this site, good car models were going for like 90-100usd, and even better ones higher.... Sortof sounds like an interesting idea..
Truth be told though, I love Evo's, car design, and was curious how to model off blueprints.... I fond the Evo's BPs, and went at it.... hehe,

.. So, mostly practice that leads to other things hopefully.. Next time around, it will be a completely original car desinged by me.. =)
PS: Yeah, airfix.. hehe, also, you have to make your own parts here... so this would prolly fall under Skill 19 or 20.. lmao.. if they go that high.. XD