How to get fair trade-in value for my RAV4? Should I compare it to the $20,000 RAV4 across the street?

I’m trading in my 2017 RAV4 XLE AWD with 155,000 kms at a VW dealership this week.

Across the street, there is a Honda dealership with two for sale … a 2016 RAV4 XLE AWD with 105,000 km for $20,000. And another 2016 RAV4 XLE AWD with 185,000 kms for $16,000.

I have not checked the condition of the two 2016s, but my 2017 is in extremely good condition.

Mature couple no kids, extremely well maintained at the Toyota dealership. The back seat is immaculate, practically never been used. The front seats a very neat and clean (my wife is a neat freak).

New tires this year. No mechanical problems, brakes are good.

So ….

What’s the trade in value of my RAV4?

Is $15,000 reasonable? Is $16,000 too high?

How should I approach this to get best value? (Note: I don’t want to sell the car privately.)