FWIW, I traded my '06 Street Glide in on a '12 Road Glide Custom in December of 2011. My '06 had 40K miles with the 88" engine, 5 gallon tank, 5 speed, and no cruise control. The '12 has cruise, 103", 6 gallon tank, 6 speed tranny, and "new" '09-up frame.
Local dealer gave me $9500 for the SG and sold me the RG at MSRP. They then turned around a put a tag on my SG for $13,995 and it sold within 2 weeks. Don't know what they actually sold it for but this was in the winter of 2011. Salesman did say they could offer more on a SG as they were more popular and could easily sell them.
If in my part of the country, I'd be happy with $10K for your bike on a trade assuming it's in great shape.
Keep us posted and let us know what they say.
Any day on a dirt road is a great day