Looks like the have a relatively small inventory of convention type autographs - not really any red flags with the inventory or pricing. However, I can't see any images. What are your concerns?
It looks like he must have changed his website drastically since the last time we looked at it, since there is decidedly a very different look and set of inventory now than there was in November. Unfortunately, I have no familiarity at all with Tennant.
Perhaps post your concerns in the original thread from a few months ago. There seemed to be some people there who had more insight on the seller.