Too much $$$ for that many miles IMO. I bought mine for $2,000 and it had 1,600 miles on it and over all very nice condition. Better deals can be had. As for the pannier racks they look home made to me but could be some from Happy Trails set up to fit this TW. First I have seen of a set up like these but maybe they did buy them somewhere.
I went with the Cycle Rack and their bag frames. The rear rack is awesome and the pannier frames are good too but not real heavy duty but they do their job. Worth the extra $69 bucks I paid and can be taken off and put on in seconds which is a nice benefit. As for me I am sold on the Cycle Racks set ups. Good quality and prices are fair for what you get. I researched high and low and thought of building my own before I pulled the trigger. No regrets but you have to shell out a couple of good bills for them.