dave_mc is right
i tried a vintage strat once, there was nothing wrong with it. eastern popular body wood on that model though, so i decided to steer clear. according the the specs the SG should be mahogany - definately worth a look i reckon.
yeah, i've tried some of the vintage advances which actually were quite nice, but i haven't tried the cheaper ones (and the vintage advances are allegedly a step-up from the cheaper ones). actually, now i remember i think i did try the cheaper vintage LP goldtop with p90s, and i wasn't much fussed on that, but i haven't tried the sg.
anyway, i was more disagreeing with the principle that if it's cheap it's almost worth chancing it (unless you know it to be decent as well), rather than the specific guitar which i have no idea about. :)