I bought a new S G last the other day, and I got the dealer to come off the MSRP 1100. He was not interested in taking my 99 softail though.
The bike is an 09 and does not have the catalytic converter in the head pipe as I'm told that all the 10's do, and beings how it is technically a new bike it is still 1 year old, so this is a selling point as well, (old inventory).
If I want to sell it I will probably have to try on my own. That's how you would get the most for your bike, but you run the risk of just keeping your bike too, but the dealer really does not want your bike.
A friend also bought a new S G as well and tried to get them to take his just freshly painted 80" shovel and they wouldn't do it either, so there you have it.