Thanks. After reading your comments I went on the hunt and immediately found a resealed MK I on Brad's. Pretty good price at $100...I think? Should be here by the weekend. I'll update then. Yes I always wanted an LD. Some day! But at least I'll have something to compare to now. By the way Tim, the S&W rebuild kit works great. I just recommend it to someone here that did the eBay kit and it leaked.
Ian and rws_53, those are exceptional examples of some classics! Thank you for sharing the eye candy and your experiences. My 78 has been ridden hard but that's ok. It's the experience. Hope the MK I is a shooter. There's just something pleasing about shooting older guns like my couple of Crosman 102s or silver streaks. Not one hopers but I don't care. Love the old stuff. Next on my bucket list is a nice Crosman 600. Anybody got one they want your to let go to a good home?