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@kopenhagen5 wrote:

 I think the message is 'You do not meet the requirements of this seller'

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The exact wording in bold red type is

" SORRY, THE SELLER ISNT ACCEPTING BIDS OR OFFERS FROM YOU AT THIS TIME. "

Followed by .....( in small black text ) .......

" This may occur for various reasons. For example the seller may have a limit for the amount of items that can be purchased within a given time  LEARN MORE "

The link takes you to a generic " All about bidding " page that makes no mention of seller blocks.

So basically the buyers only see ebay fluff and nothing that directly tells them they have been blocked or why.