i think if he wanna do a direct trade, it would be quite worth it for you. COE + parts of his car + car body = more than 45k.
But things you may need to consider are:
1. How long is his aftermarket parts been used
2. Condition of chassis and engine
3. I know he drifts in that car, so check what parts are giving way
4. Is it back to 4wd? If it is still rwd, worth it?
5. Maintanence, you don't wanna go through the trouble of coe cars once again do you?
if all 5 points are not a matter to you, i would say, a trade would be a steal for you, =D