When I add an advert to my shopping cart and I delete cookies, the ad appears as "unavailable". This also occurs when the user has forgotten to clean the shopping cart. In both cases, the seller's ad appears as "unavailable" and the ad is no longer available for purchase. The seller when this happens, you can not know if your ad is "unavailable" and is a great disservice to all sellers.

I want the ads are always available and the status changes to "unavailable" if it has been purchased and payment has been successful or is modified by the seller.