[Cupid]

That means the Ebay software, on their side, blocked your bid and likely would have blocked any bid you tried to make on that item by any means.

Probably the best chance you have of finding out why is to contact the seller and ask them if they set up any requirements on their listing that would have caused your bid to be blocked.

You could also ask Ebay customer support, but I haven't seen anyone get a useful response from them in a case like this. I suspect that very few. if any, have the level of access required to the Ebay systems to be able to find out exactly why their sifteware blocked a bid.

Going forward the only real way to be able to tell for certain whether a block like this exists is to try placing a bid yourself, but that is not conducive to sniping items via an automated tool like Gixen. Fortunately it happens so infrequently that its not generally necessary to resort to such methods for all your auctions.