ON any PK tractor, I always plan the tear-down, ispect and replace routine on any I have gotten. SO, have to figure a lower price, as you are gonna put lots more into it before it is what you want it to be. If not willing to do that work, buy a better one. All have the same things wrong with them, usually locking trans or blown engines it seems. Clutches also are bad. I like the PK here, good start. To me, IF I had the money, would be around $500 or $600. Looks like some mods, not sure what that thing is hanging out the side, looks like hydraulics of some sort. Added for sure, not orig systems. The second one is really changed. Twins were not in them till plastic body ones, and now that metal hood and area is all hacked up, will need replaced. Not sure how the bellhousing would be connected on that engine either, or if totally diff driveline or clutch there?? Another home-made hydraulics system. Love the hoses hanging out in the wind by steering! If one owner of these, I would offer around $750 at most and go from there. As noted, lots of changes from orig, guess it is WHAT you wish to do with the tractor that counts. Want original all pretty and done, or want a Worker for doing chores? Restored will be much longer time and money in them, trying to use, is flip of coin on what might be needed. Myself would look forward to the PK, the EConomy is just kind of a "throw-in" on the deal, not as valuable.