I would say that IMHO my list of current/recently dead pistols to buy as keepers would be
Cometa Indian Pistol - Querky interesting design combined with "smallish"(I would guess) sales. If you could afford it get one in nickel, and one black one.
Webley Nemisis - As webley are no more so this pistol can only go up in price.
Webley Hurricane and Tempest - Get them whilst there are still great condition (relatively little used) ones about.
BSA 240 Magnum - If you are lucky enough to be able to find a good one hang onto it for dear life.
HW 40 and HW45 - Top quality - get one and keep it mint with all accessories
Anybody else got any idea's