Gil,
There are a number of K&C rareties:
1. The Glossy Free French & Glossy U.S. MP (1993) - Free French didn't sell well, very few of this set produced;
2. Matt WS04 Panzer Crew (1997) - never actually advertised for sale, phased out after less than 30 sets produced, by far the rarest matt set;
3. Les Miserables (1996) - 200 sets produced, mostly for the cast & crew of the Hong Kong production of Les Miserables, very few sold to collectors;
4. Afrika Corps Short Barreled Panzer IV (1998) - One of a kind repaint of the gray polystone Panzer IV used as a backdrop to standing Rommel figure in flyer, then sold to a collector (guess who);
5. 8th Army Sherman, wood (1997) - 2 produced, one sold;
6. Wood version of Iwo Sherman (1997) - 4 produced because a certain collector (guess who) hated the polystone version of IWJ11;
7. IWJ11(W) (1998) - Winter version of IWJ11 made specially at the request of Tony Cicarello of the Toy Soldier Gallery, 10 made;
8. RA05(w) Winter white version of T-34 Tank, made specially at the request of Tony Cicarello of the Toy Soldier Gallery, 15 made;
9. Prototypes of vehicles Andy decided not to produce, including Bedford Troop Transport Lorry, Bedford QL Radio Command Vehicle, Humber Command Vehicle, no more than 3 made of each, usually one each of different camo schemes;
10. Austin K2 Ambulance (wood) in Desert markings (1996), 5 made;
11. Vietnam Duster Anti-Aircraft Tank (1997) 5-10 made;
12. Resin & Metal Version of Hanomag (1996) 5-10 made.
These are pretty much the rarest of the rare K&C pieces. As you live in queens, if you want to see them all drop me a PM and take a trip to see my K&C museum in Roslyn Harbor (Nassau County, exit 36 off the LIE).