Any research vehicle can provide interesting information or not so interesting information. You pay your money and you take your chances. Be thankful that "NO INFORMATION" usually results in a refund. As for the expensive Colt letter, a friend ordered a letter on a Colt shotgun, #39 as I recall. The reply indicated the purchaser's name, gun specs, no more. Several months later, another letter arrived indicating that the purchaser had been identified as the General Counsel for Colt at the time the shotgun was introduced. Probably worth the price of the letter.
