I have exactly that one.
It's the first with the fork from the Xb12 with the short wheelbase from the former models. It has no frame pucks. If it has, they normally hide some marks from falling.
Can't say anything about the prize, but it seems fair to me. In Switzerland they cost far more.
You do not mention the millage;mine has passed 90'000km and the only bigger problem I've had, was the famous pinion from the oil pump. The teeth were scuffed and paper thin. I've replaced with the beryllium-type offered by Buell and have it checked since at every service, works great. This was with about 25'000km.
Had the rubber mount in front changed twice and tons of bearings on wheel, belt tensioner and steering head. Had to ditch it twice because of a broken belt and I do have a second exhaust. I've to clean and paint it every second year because it rusts like hell. I guess the next stop will be to change a hydrolifter.
I use my bike every day, rain or shine for work and according to my mechanic that's why it's still working. I do only replace if something is broken, means no customizing. I actually never had the money to spend with customizing. It's not that I'm averse to it: It just appears that this was faithful to the bikes life. Mods are made if the original solution does not match the needs. I've installed a belt tensioner from Free Spirits for example, but it didn't solve the problem not till I made a new tensioner pulley and changed the exposed ball bearings to a covered roller bearing.
At my mechanic's Garage there are four more Buells, all of them 12er. None has more miles, but all have more troubles. As I've heard stator problems occur if you run for long distances at high rpm, like on the autobahn.
I can recommend this model. It's not a cheap thing, you should not be chintzy. The bike needs a good hand and an experienced mechanic and normally you do not get this for free. The same applies for cheap oils and fuels. I've used Super plus fuel since I have it, not for better performance but to avoid sooting of the spark plugs.
Have the motor checked, especially the oil pump pinion, change all fluids, have the brakes checked and get a new battery.
When the battery starts to get weak as it happens in October and November when temperatures are falling and the bike stands outside the whole day I use to attach it to a accu-jogger at night. That's probably why I'm on my second battery in 12 years.
I bought mine new from the dealer and broke it in thorougly. As the previous writers have outpointed jet: The type and number of prior owners is a crucial point.
I came from a Yamaha and in the beginning I was surprised how much care this bike needed. But I was even more surprised how much fun it was and still is to ride it.