First of all, welcome to the forum!
Second, are you sure that that 2010 bike really had 185,000 miles on it? The odometer on my 2005 will only go up to a maximum of 99,999.9 before it would presumably roll over. I believe that a forum member (Qwerty?) claimed to have 48,000 miles on his bike, but I have never heard of anything close to 185,000 miles on a TW! My guess is that a bike with that kind of mileage would need more than just tires.
Here is an active thread with current prices for new TW's so you can see what they are going for in various areas.
p.s. I just noticed that this thread is double posted and several members had already responded to the first posting.