Today I tried to snipe two items, and for each attempt I get :

Error: Item #291590084452 cannot be added because it appears to be an invalid item number.

Not sure what is going on. The items are still on eBay (they end in a few hours). It has happened for two different items.

Hello Jeffrey,

We are checking into this now for you and will respond soon.

Kind regards,
BidSlammer Customer Care

Hello Jeffrey,

This is now fixed.

Cheers,
BidSlammer Customer Care