I have to agree with what others have already expressed, collect for enjoyment, not investment. If you happen to make a tidy profit, if and when you decide to sell something, then that is a bonus!
Personally I think that the KC AR range is one of the finest available. If somone can snag some at discounted prices, good for them. I always try to get a deal when I purchase anything on secondary market. Just like buying anything else in life. If you purchase any TS and sell within 5 year period, I think you are risking a loss. I buy for the long term. Just my 2 cents of course.
Walt