This isn't a CS request so much as it is a bit of a comment about the market place.  There were a few things I wanted to buy from an artist that used to sell models here on renderosity.  His items aren't directly available via the marketplace.  However I click on a link to one of his items from texture addon that another artist released and it takes me to the product page.

I'm pretty sure I'm not supposed to be able to buy it and I'm resisting temptation because I figure that'll cause troubles, but that product is still hanging out there.  If one of the CS people would like to know which item it is, send me an email or a site mail and I'll tell you the product and how I got there.

Is there an add to cart button on the product page.  I find that many times items are no longer available for purchase however if you have a direct link to the products page the product will show up however it will say on the page that the item is no longer available for purchase and will not allow you to add it to yoru cart.

On a side note I am not a CS person so perhaps they have a better answer :)

Yes, I too have come along the * Item is not longer available for puchase * pages and rebelmommy is right, there would not be an * add to cart * button.

Hope CS can clear that up for you.