I was just picking on you. I knew there was some big money sitting there. Nice collection indeed. Which are the rareist?
The ABSOLUTE rarest and holy grail of P7s is if one could get their paws on a P7M7 45 ACP (like getting an R9 in 45..hehe) No, don't own one. Would probably fetch 100K to the right collector. From what I understand, there are only 7. I know of only one that is owned by an individual that I know personally.
In reality though, it goes sort of in this order not counting "one offs" or R&D types.
A P7K3 in 22 cal where the serial on the frame matches the slide (they claim there is only 10. I have one of them) I know of another who has I think 6 of them.
One of the original "Model PSP"s, I think there are 230 or so of those.
Factory Nickel types in this order with quanities produced):
M8 (200) then M13 (1200 maybe?) then M10 (1000 to 1500). All are Sterling imports. Having all three is considerd a "Nickel HK hat trick"
"Jubilee M8s", only 500 made and came with presentation box and Nill grips.
Then the remaining K3 variants (I think there is 3000 or so total) More valuable if has caliber conversion kits with them.
Rare "E" versions of the PSP (one year only, maybe 200, not sure on the count of those)
M10s in general are next with a total of about 3000 made split between nickel and blued (see "Factory Nickel")
M13 variety in order of desirability = Chantilly, Sterling then Trussville imports
M8 Same as M13s above
PSP models that are not "surplus" such as ealy 80s types"
LASTLY...THEN ALL THE HEELERS!