Can anyone really be that stupid? I know its ebay be thats just unbelievable. Part of me thinks (like a number of ebay buyer he's trying his luck) did he mention anything about feedback in his email? As thats almost always a site that they want something extra.
Althought I think if he really thought it was numbers of items and he realizis just how stupid he was then you'll never hear back from him again.
When i was a manager at Currys we had someone who handed in a Job Application form. In the section that said 'Breaks in Employment" he wrote "12.30 - 1.30 for lunch"