The 1/4" SJ was listed as weighing 11 oz. Comparing an old 3/16" model to a new one, I would guess the new one is very slightly heavier due to the different shaped handle. I have not held a new SJ, but I think the thumb ramp on the new TAC handle is an improvement, and I do like the handle on the old one. Regarding price, I would say $250-$400 for a new one, depending on the model variation (CG, LE, and more limited editions such as the ZT, desert, and different camo models). Depending on the model and amount of use, the price will vary. I would say for a fairly well used (not abused) SJ CG in otherwise good shape (no significant nicks, etc.), the price would be $175-$200.
Gene