What about your Close Rates, appointments, Phone calls, and site traffic tell you to stop?
We share 9 stores' inventory on 18 URLs at the group, market, and store level so it is a tangled web BUT a store has a much larger inventory to pull from than just their own. More opportunity to convert to a hand raiser at each store on units they wouldn't of had an opportunity if not sharing. We do let the shopper select any car and also to select any store they want to deal with on both the group and market level for Used and similar Make New.
Just this morning I told our CMO again, "I wonder what would happen if we siloed everyone back to just their inventory on just their sites". It would make syndication easier. I will say it took stores years, and they are still working on it, to play nice with other stores that get leads on "their" cars. We have a clear corporate policy that covers freedom to move vehicles, New and Used, from store to store for the benefit of the shopper. If they have a problem with that > 30-30 Rule, walk 30 feet out, look 30 feet up, who's name do you see on the sign? Those are his cars! Our stores are spread across 250 miles so transport and driver fees are a consideration of this overall sharing strategy. Every time it has been challenged, usually because some manager got their feelings hurt over them perceiving they lost a deal, it has been voted to keep by the stores overall. Ask your GMs, "Do you want to sell every car or sell every customer?" Whether they answer either way, you're still left with needing more inventory which can be done by pulling from other lots. Other factors like inter-company transfers from an accounting standpoint, CPO transfers (and open recon Parts/ROs), and like I said prior, transporting units just to demo/test drive and that expense and time are counter points. We do balance inventory corporately between stores based on vAuto data to give us the greatest chance to turn quickly while avoiding transport expense.
If CarMax does it, and they clearly have a well-oiled process to transfer, why wouldn't we? More leads per VIN = faster turn.