A bagger with 20K miles for $10k... Good luck with that!
A $30,000 bike is not going to drop 1/3 off the price in 20K miles, unless it has came to a very sudden stop.
My Ultra is right at 40K miles now. I would consider it a insult for someone to offer 10 k for it!
I know many Ultras and SGS's with over 100K miles on them and still running as strong or even stronger than the day they left the showroom. It's all about the maintenance and TLC.
Sure you could find one in the low miles and price your seeking, but BUYER BEWARE! It's going to need a bunch of TLC to get it where you want it.
Miles don't get put on bikes that don't run.