Look what I've found:

http://www.ebay.de/itm/2x-Plateau-Dual-Mana-Dualmana-Dualland-Dual-Land-Ultra-Rare-Doppelland-/281424747903?pt=Trading_Cards&hash=item418638dd7f

Two Plateau for modest price, they look quite good, except for the fact that on the bottom of each card there is a date (1995) + copyright, the date suggests it's 4th Edition, but there was no Plateau in 4th Edition. Is it some German specific edition, or is it a scam?

I'm not sure if THOSE two particular cards are legit. I'm not good enough to give you knowledge of a specific card and the ways to know if specific cards are a good card or not.

What I can tell you is that yes, there are German, French and Italian white bordered dual lands from what would be an equivalent of the revised set (though in German and French at least called the Unlimited set...keep in mind with revised edition cards though) with the 1995 date in the corner.

The German Black Bordered version of those cards (called German Limited...but again, consisting of the same cards in the revised set) also have a date in the corner...1994.

In other words...those cards COULD be legit.