I bought a Mazda 787B a while back, it's OOP. It was rereleased three years ago, but it's not a permanent part of Tamiya's lineup.
I also have Tamiya's Mercedes CLK-GTR Original-Teile version (not the CLK-DTM) that is also OOP, it's just a decal variation of their Warsteiner one (the Sportswear is becoming hard to find as well, but the Original-Teile is the rarest)
Also have Tamiya 180SX and Silvia, like jay said they are OOP, the Fujimi Silvia with 345 Tuning bodykit in the gallery. My hobby shop stocks a ton of semi-rare kits, like Fujimi 80's kits, and a bunch of 1/16 Italeri, reboxed Fujimi Testors, and Fujimi Ferraris. They also have a sealed Rosso NSX 1/12 which I've been keeping an eye on.