More than you think all the cameras except D90 D300 D600 and D4 and the 2 new ones. There are rumours that the D90 and D300 are being withdrawn the D4 never gets rebates so why the D600 has not been included is the only surprising ommision unless it is being withdrawn!!
There are also rebates on lenses and flashguns and non DSLR cameras with the rebate though the D800 is £3 more than the new D610 at current prices and the D5300 is more than the D7000!!