I just checked the Apple refurb store and now there are a dozen Mac Minis for sale. Must be the pre-WWDC rumor jitters.
Only two showing for me now - an i3 and an i5. Based on what people have posted, it sounds like a different assortment of Mini's appear depending on something like your ISP, location or ??? As posted earlier, 13 Mini's dropped yesterday afternoon when I checked, an hour earlier there were none and before that I only saw two appear on Monday. When I bought mine yesterday, it continued to show in the refurb store for about a half-hour afterwards and then vanished.
Funny, I had gotten into such a habit of constantly checking the refurb store, now that mine's on the way there's an empty place in my daily routine, LOL. 😂