Just 'cause you can't readily find the forum natives and militaries doesn't mean they are very collectible, just a short run. The blue native comes up for sale occasionally and I've not seen it sold for more than it cost, although it has not been sold for much less than cost either.
Pesonally I'd like a PE spyderhawk, but not so much as to pay full price and have it with a forum logo. There could be others who feel the same way. If I wasn't a knife nut, I'd probably prefer the spyderhawk in serrations, makes it more of a ripper, which is appears to the the original intention of the knife design. The G-10 Harpies were a disappointment to Spyderco, and a bunch were finally sold off as closeouts for ~40% of list price by Smokey Mountain Knifeworks.