How much price gap to fill if I trade in an old brz for a new one

[Nakioki]

I wish I can see the kbb on my 17... but kbb doesn't even have the brz listed on their site... and it's already 2018 =/

[Jordanwolf]

Originally Posted by larryjohn

Background Story:
Purchased an auto brz => Chose auto because it's my only car, easier for commute and long distance driving => Test drove my friend's manual 86 several weeks ago => Realized I would prefer a manual.

So, I'm currently considering trading in my brz and purchase an 18 one in manual. Question is: How much (extra) will I pay for this? (depreciation, unreturned tax, etc.)

I'm sure you'd regret trading for an older model in standard like all these people are telling you to do, more than you would sticking with this auto that is brand new.

What I would do if it really bothered me would be trade up, and eat the loss. But if I was patient, I'd wait however many years you have to pay it off then look at what's new, maybe even a newer iteration of the BRZ/86.