I was asked to clarify this blog in maramail. Hopefully this helps.
"The guide means 10 stats in strength, speed, defense, and health. Apparently 40 crystals used to be worth 1mil, when this stat guide was calculated (several years ago by aanghere). I haven't seen a new stat guide at all, so I tend to just use this one loosely.
On pet auctions, stats normally sell for about a third of the prices listed in the guide.
From what I've seen of pet trading, stats aren't valued much by people (partially due to all the free stats) until they get up to 80 or usually higher I think.
We definitely need a new stats guide on this site :3 This works as a general guideline though..."