This just happened to me, and I wanted the Devs to know about it (they've been emailed) and everyone else, to see if it's happened to other people or to warn them of potential problems.
So a few mins ago I struck a deal with a guy to buy the Prisma Driver recipe. After buying it, I wanted to craft it immediately. I went to my guildhall for the crafting machine and opened up the energy market. I only needed 100 energy but I was going to buy 200 so I could have some to play tomorrow.
Anyways, I put up 2 offers. I believe they were for 6436 crowns each. At the time they were the highest offers. After a few seconds or so, both of them sold. My crowns were taken, and I no longer have them nor access to them. On the bottom right, the energy count blinked like normal.
But I never got the energy.
I couldn't believe it. I've never had anything like that happen. I don't even know if the seller got his crowns. But now I'm sitting here out almost 12900 crowns and I don't know what to do to fix it. Especially if the seller didn't get his crowns.
Sometimes that's just a graphical glitch---the numbers don't get refreshed or something.
Did restarting your client help at all?