iirc, eBay works like AWS with availability zones. So depending on your location and connection it may be less likely for you to pick one up. I have known there were caps to be listed and hitting F5 to see them but due to replication, they were gone before they ever showed up in my area. Which I am ok with. This would also explain why some of the guys who won eBay caps in the past were able to get a second or third.