Hi, derSammler! Information abt SegaRally I got from some Nokia employees, so I have no reason to not to trust it. As for "properly" sealed version, I think U also a bit mistaken here. In my collection I had both variants - stretch film and usual normal film. Stretch film always can be found on the AU-Oceania releases (OFLC). If I remember right, all OFLC releases I met, always were in stretch film, everywhere - of local flea-markets, or eBay too.
So, example of Sega Rally mostly an exception. Also, both variants (if they are genuine) always have security seal on the game box side, like on your photo.
As for some other Sega games like Virtua Cop, Alien Front and some internal cancelled Sega titles, they were completely cancelled on ~G2.0 Beta stage. U may saw original MMC media above on my photos.
Also, nice Snakes, but U have custom hand-made box with printed picture over normal retail MMC holder.
MMC is real for sure. Originally Snakes G3.0 Gold Press MMC was in zip-lock pack with some adv. media printed on it.
If I remember right, something like "Beware the Snakes is here" or something, and printed link to N-Gage Arena sub-site.
And, enough nice Taito display box. Is it empty inside or U have Dev-MMC?
I have my Taito Memories Prototype on genuine Dev. MMC.