keyboard to your driveway... bhoecht,
Sounds like you're one your way to creating a complete ecommerce platform for a dealership.
At this time, IMO, your vision is ahead of the audience... both dealer and consumer... BUT, to give the shopper a choice to "opt out" of the dealership visit, this is interesting.
There are obstacles to this. Consumers still distrust the dealers and want to see, feel & smell it. The trade-in still needs to be negotiated. Consumers with a fist full of ACV trade-in quotes will drive in and "sell" the dealer thier trade.
Also, I believe a Dealer will fight to keep the buyer focused on the bright shiny metal and move to keep the "after sale" items out of the pre-sale light. Margins are higher on a captive client than a shopper.
On the positive side, should a legitimate BUYER/Dealer feedback system for dealers take shape, NOW you've hit the mother load!
g'luck |