I never saw the box for matching. I use Firefox with the NoScript add-on. I allowed tubestore.com but not everything needed to see the box. After I allowed "everything on the page" then I could see it, but it was too late. I hate it when pages use other websites to implement dynamic parts on their page.
He definitely seems to know his stuff and, from reading his site, likes the tubes I had already ordered. His price is higher than I paid.