Hi,
I know more about vintage than modern! I don't know specifics about this brand, but the company, judging from their designs (via a quick ebay search) was active circa mid-to-late fiftes through mid-to-late sixties at the least. Don't dismiss it for yourself yet - after several seasons of giant, celebrity-toted, slouchy bags, smaller, more structured bags are coming back in. Look at the bag feature towards the end of the Aug. Vouge for an idea of what I mean. Alligator and croc are also having one of their periodic fall resurgences.
After your eye adjusts to the more structured, grown up look of fall 07 clothes and accessories (though don't get me wrong, I've loved living in trapeze or shift dresses all summer!), that "conservative" yet "pristine" alligator bag might look a lot more... now. Still, if you want to sell it, look at similar bags on ebay. Search "alligator" and then look at items listed in both the regular purse section, and the vintage purse section. Look at what's getting bid up, and set your price accordingly. If you post pics I can give you a more thourough assessment of what you've got!