They are legit - I have ordered from them in the past with no problems and have recommended them to others on this site looking for some older balls.
I think Charlest is correct on his speculation. They seem to have a close relationship with Visionary.
As to Visionary's blems - they have a very high QC standard. The following is from their website:
By doing all of the work in house, it allows us to control and maintain both the quality and performance of our equipment. Many companies do random inspections, but at Visionary each and every ball is checked individually for hardness, roundness, weight, topweight, pin placement, and overall quality. If it is not right it does not leave the factory.
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