You are talking a car that's priced about $25-30K LESS than the car you want (Evora).
Not to mention that an Evora is a niche purpose built car, whereas a 328i coupe is a daily driver. Most people with Evoras (or other Lotus cars) already have a daily.
I don't think I've EVER seen a 'want to trade' thread end in....a trade. The likelihood that someone will want your car AND want to get rid of theirs AND their car is the one YOU want AND they are geographically desirable. Hell, like 7 people in total actually own Evoras!
Best to just sell your car outright and then look for the Lotus that you want on your timeframe.