Has anyone ever used a company called vacuum tube values to purchase vacuum tubes?

Hi. I need to purchase 36 Golden Lion kt88 tubes. It looks like the average cost for that would be about $1,600. I ran across a company called "Vacuum Tube Values" where I can get them a couple hundred bucks cheaper. Has anyone had any experience with this company? I have seen discussion to be careful about buying from a non reputable dealer because you can get less than top-quality tubes?