@ KevinC, I will be in Scottsdale in a couple of weeks... I'll be there all week, reporting for the SL Market Letter.
I'll be attending all the auctions, but paying close attention to the cars at Gooding, RM and Bonhams... of course I'll check out BJ too, and Russo and Steele is always a good show.
As you probably know... the quality of cars varies so greatly at the Arizona auctions and the prices can be crazy... although, there are still deals to be had, but they're few and far between. I think it's a much better place to sell than buy... buy W113 190 and 300SLs anyway. The occasional nice R107 SL slips through the cracks or a 280SE 3.5 sedan or something a little less off the radar than SLs.
Last year I was looking over a 280SL in one of the Barrett Jackson outdoor display tents, it had already run through the sale and had a 'sold' sticker on it. It was dark blue, incorrect upholstery (MB tex) pattern, thick repaint, modern CD player, speakers installed in the parcel shelf, various other things that made me cringe... underneath was freshly slathered with textured black undercoating which always scares me. A guy walked up and opened the door and put something in the driver's seat. I asked if it was his car. He said "Yeah, I just got it for $75,000 (something like that anyway), I saw a guy pay double that yesterday at the RM sale, this was a deal!"
He was really happy... which is great, but he thought he got a deal because he saw someone pay twice as much for a different 280SL a day before... and it gets me thinking about how few 280SLs are really $150,000+ cars. While the market can drag lower priced cars up as the perfect examples sky rocket... those lesser examples will never be great examples. The price difference between #1 cars and number three cars is often double or triple.
I think there are a lot of people in AZ who see something crossing the block that looks 'cute' or 'cool' and they raise their hands with only a very basic knowledge of the market and even less knowledge about the car they're raising their hand for.