I was wondering what the value of a 2003 Les Paul historic 57 RI goldtop would be. A friend of a friend is selling his, but he's not settled on a price. He has had the bridge pickup changed from a Burstbucker to a 57 RI and the neck pickup has been potted to reduce noise. He also changed the pots and had a refret to jumbos. He has all of the original parts and paperwork and it's barely been played, so it's in great shape. I'm interested and was wondering what a good offer on my end would be. Any help would be greatly appreciated. Thanks!