XC90 from Volvo dealers via intermediaries

Hello together, a supplier offers an XC90 (no import) via a brokerage business to a Volvo dealer with an attractive discount (approx. 16%). Since my trust even after exploring various possibilities wanted to offer me only a discount of 9%, I now seriously consider the brokerage variant. Regardless of the specific provider, I would like to know in general whether/what kind of experience you have made with a brokerage business or what you can beac (The VAT problem at the turn of the year is clear to me. However, I was obliged to deliver at the end of the year.) Thank you for your help, if necessary also to PN. Greeting Ralf