Hi, i'm looking at a sigma SG-7, i belive it to be a gibson copy from the late 70's / early 80's. I've only found a result on goole for a SG-5 on this site, the others were funnily enough in sweden. What i would like to ask is are they any good in the scheme of things, what would their value be and any history to boot would be awesome.
Cheers,
Owain.