From my experience I've found dealers to be purely reactive in their approach to sales. I've only had one call back (out of about 10 Lexus dealerships) to ask.... are you still looking or I've got another car you might be interested in etc. In addition, I've offered on cars, it's not been accepted, then the price drops very close to my offer but never received a call. Most seem happy to wait and rely purely on incoming enquires....