It's nice to be able to see/feel a knife b4 you buy it but sometimes that's just not possible.
I've purchased ALL of my autos that way off of the Exchange and from other places knowing that I could resell all of them w/o much difficulty w/o losing much if any $ doing so. However, I've NEVER resold any of the autos that I have purchased and I own 23 of them now, including an Autonomy2 and a MicroTech Socom Elite (which is similar in size/action to the LUDT).
The MUDD is unique in build but not in function. It opens and closes and cuts like any other folder (manual or auto). What makes the MUDD unique is its totally sealed body and pivot which is ONLY important if you plan to use the knife in conditions where water, mud and other sh*t might get into it that might muck up the works.
If that's not important to you, don't buy it -- that's assuming you're on the list and are offered one or can find on the 2ndary mkt. You could buy one of the 11 CRKT "field strip technology" knives currently available instead for about 1/4 (or less) of the price of a MUDD but, unlike a MUDD, you'll have to take those knives apart to clean them, which would not be required w/a MUDD (whether manual or auto).
BTW, I only bought the MUDD because of it's unique design. I never use any of the knives in my collection -- I have other knives that I do not consider a part of my "collection" that I use -- so my MUDD will never even cut paper let alone get dropped in the mud. I also have a field strip-able CRKT RTD which won't ever need to get cleaned either.
I just like buying different types of knives w/unique designs that I also find visually appealing for my collection and the MUDD is just one of those.