I'm more annoyed at the balls it takes to sell your spot, when no one one even has a build number yet!
This CE could be the last one, or the 51st one. No one's gonna jump on this if they don't know how far back in the line that they'll be. Doesn't make a lot of sense to sell until the build order is finalized. The OP could at least say when their order went through, that would give some idea of build slot then.