612 dealer swaps

I know dealers will send cars to auctions, etc....However I notice a few '05-'07 612s for sale nationally have changed dealer hands - and of course the price has gone up $5-15K. In some cases a careful read of the CARFAX will show this. However one was traded in at an east coast dealer and prior to the picture and details posted is now surfacing 5 days later in the midwest. There's no trace of it except I was able to catch it by VIN. I wont mention specific details here. Another in California has changed dealers. In that case it was sitting for months now also with a price increase. I don't understand the business model....Anyhow not sure if anyone else sees this going on. I can't see how on a somewhat niche car raising the price will seem to get the job done. I guess current owners may be happy but will it only be a temporary inflation of value?