I have a Sigma/Martin solid body electric guitar (Stratocaster style) purchased new in 2001 from a little music store in Billings, Montana. Can anyone provide me with some information about it (model, value)? I have seen a couple on ebay, but they didn't list a model. It is tabacco sunburst finish with a white pickguard. It's serial number is S99090155 and is made in Korea. Has "Sigma Established 1970" on it. Any ideas?

Thanks,
Redeye