I can't afford any knives that are in the "collectible" category, but I do highly value and appreciate a first rate cutting tool and own one or two. The Al Mar Eagle ultralight that I have is a very good quality lightweight folder that came out of the box razor sharp. Like most of the Japanese cutlery I've handled, it's very well designed, has good balance, and is so sharp some care is needed when handling it. Since I have a Benchmade Ascent (the larger version) for EDC, the Al Mar tends to sit in a drawer. I consider it to be appropriate for carry when I'm dressed up and that's the only time I anticipate it's use. I carried an earlier Eagle until I lost it on the water and that one got a lot of use and held up well. For my purposes the partially serrated blade is always my first choice and both Al Mars I've used had that blade configuration...
I'd say anything with the Al Mar chop is worth a close look for actual use, display, or if it's an older one (when the maker was alive and actually creating them himself) it's worth some money as a collectible. Me, I'm much more interested in its utility.... in that category it's well designed, lightweight (the Eagle) and has a very slim profile.