Of that list...
Metal Slug (SNK Playmore)
Samurai Spirits III: Zankuro Musouken (SNK Playmore)
Samurai Spirits IV: Amakusa Kourin Special (SNK Playmore)
The King OF Fighters '98 (SNK Playmore)
The King OF Fighters '99 (SNK Playmore)
The King OF Fighters Kyo (SNK Playmore)

...are the only ones I'd bother with. :\ Especially KOF:Kyo, since that was so limited in release. Sony(and SNK), port'em here for download, damnit!

LoL ... arthur barnhouse's comment is damn near t-shirt worthy.

And true. Because I have based this upon opinion. ;]

Nice. Much thanks. :]

I'd ask for North American localized versions of those... but since SNK couldn't even do that well enough on their own... *sigh* Ah well, someone posted awhile back on make-shift transferring imports, I guess I'll skim back a ways for that.

"Blah, most of us mgs fanboys HAVE everything already.
Do we need another copy of everything? We have the originals, we don't want Greatest Hits or anything else slapped on. We love our originals!"

...Agreed, sort-of. While re-purchasing the games would be pretty silly for those who already got the originals, I *might* reconsider if it was packaged as such:
(1)Instead of selling all of this seperately, sell it as one GIANT bundle alongside MGS4. Call it the "Solid Gear" or something. I don't know. The guy who comes up with the cool names is on vacation. ;D
(2)Much like the Subsistence set for MGS3, why not include another Saga/Making of MGS4 disc? Or go MPO style and include new faceplates, cards, cases, artbooks/guides, etc.? This MGS fan loves artbooks(and it's a good way to hype Shinkawa's impressive artstyle)!
(3)Extra camo or characters for previous games. Or hell, demos for a possible MGAC!D³ or MPO2?

LoL... I'd buy one. It can't possibly be any worse than the crappy phone I have now. And 2GB capable? That's fine.

5.5million = 5,500,000
...that's what it means. And obviously, that's the worldwide total.