No such beast, Connie. Probably you meant T100SS if it's a '66?
It should have no rust to be worth top price, be running,and have a V5C plus tax and MoT, then you might get £3000-3500, but it can reduce the value/price considerably if none of the above boxes are ticked.
Nice bikes, actually. Good handling, good (retro) looking and a sweet engine too.