I live in South Florida, and never heard of this outfit. Looking at their website, most of the things on there appear to be blatant forgeries, notwithstanding that they were authenticated by REAL or PAAS. I note that they don't show any authentication documents along with the items. There are a few apparently legitimate items, including the signed band photo, but most of the signed albums are not.
You're welcome. I would be wary as well, but there are so many forgeries out there, particularly of Jerry items, that many people just get blinded by the item, and really don't pay any close attention to the signatures, many of which are so clumsily fake.
I can't tell you for sure that Roger signed off on any particular item, but at the top of their page, they list Roger and REAL [Roger's company] and PAAS as their primary authenticators. As I said above, there were no COAs shown with any of the items, so it is impossible to tell who may have authenticated what, so Roger can't be associated with any particular item on the site.