I have had the M2 and M3, and they were both pretty beat up. But, these were those with no blades or tools. The M4, as I understand is locking with its fold out tools Decent lengths on its tools as well. It has the tools I need, and pretty robust pliers and tools for its size, but I have some problems. The cutters on my M2 and M3 were no good. The MUCH Cheaper LKL SwissTech Microtool (also American-made) has great ones; and those are easy to find for less than $20, most often less than $10. But, I'm not seeing the $50-70 prices for used, and kinda rough tools.
A guy on eBay has several. Seems that usually they get discounted to $45 not long after I watch one. But then again, I'm cheap and my budget's half that.
So, should I be trying to put more attention to getting a cheap one; or just pick up 3-4 used Leatherman Squirt P4s for the same cost?