Toyota Offer for Yaris Cool

Hello everybody, I just read this and wanted to ask you what you think about it. It’s just a car dealership, but I read something similar on the Toyota homepage. If I now open a small bill, namely that I would get 6000-6500 € for my Yaris, which is still worth approx. 2000-2500 € and the Yaris Cool according to Toyota 14.330 € or according to Toyota homepage in the summer offer 9.999 €, then I would pay for about 4000 € additional payment. I don’t want to buy a new one, because I don’t like the interior design of the new one at all, but vll is interested in the offer.