Why would he be interested in large fuel purchases?

I believe you mean Baseops.net Flight Planning, Aviation Weather & Military Discounts

In fact, to look at the Guard section, here's the link: Air National Guard / Air Force Reserves - Baseops Forums
However, don't get too excited: there isn't anything current on Selfridge.

Most of the of the rest of the site is used for sport b1tching and pontificating. Don't waste too much time there.