"We looked everywhere. Looks like this page is missing. If you still need help, visit our help page"
(Starting this new thread for @amiixofeverything as their previous thread got slammed)
@amiixofeverything writes (tagging on to someone else's complaint about being unable to list new items without seeing that error message):
"I have been having this problem for a long time. close to a year. I have spent countless hours on the phone with support to no avail. This is KILLING my productivity."
I can see that you have 718 listings right now, so apparently your listings do make it on-line eventually, but one thing I have noticed when uploading my own is that not all the means of viewing the new listing (such as viewing it from the confirmation popup, or clicking the Edit link on the Scheduled Listings page if you're queueing them for a future start time) will work right away.
If or when it fails, it will give me that Not Found page that you're quoting. I do find, however, that if I give it a little time to index (I think maybe an hour, tops), then any of the problem links to that listing will begin working.
