Yeah, at $15 to $20 a figure (or $45 to $60 a set) and releases of 3 figures every few months, these figures are so affordable and amazing, it's impossible to resist just getting them all and having the complete collection of pretty much every on-screen Predator in the history of the franchise.
I doubt anything this ambitious (or done this well) will ever be attempted again by any figure company, so if you want the definitive figures of all the Predators... well, pick 'em up, it isn't gonna get any better than this! (and probably will never happen again)
That's why I love NECA, they make accurate, complex and just plain amazing figures of the franchises and characters I care about. The amount of parts, the number of paint apps, the sculpting... everything is always a cut above the rest.