I've never done this before (really!) and I'm not a saxophone player, but your site seems much friendly than some others for those of us who might have an instrument, a serial number, and little else.
Using your site, I know its from the New Wonder Series, s/n 204268 with a flower engraving on the bell, one of the Mother of Pearl Key touches, and the corking replaced before my son used it in middle school a few years back. I bought it used on EBay and it has some scratches from previous owner.
According to the research it was made between 1928 - 1934. I'm told it needs to be heard to determine its value, but can anyone give me a range?