Twelve left.
I "bought" one from that eBayer earlier this year. He NEVER shipped it to me. After a week of no shipping notification, I asked him what happened. He said he had sold them all.
After a few months, I saw he still has this ad up, I asked him "I thought you sold them all" his response was something about "oops" and he thought he had some more stored away somewhere, he'll need to find them.
I felt shafted though, he had several good feedbacks on that product