Do it like this: You split the ordering from the node. I assume here that all nodes to buy have the same price, so you pay for the url so to speak

It is like a giftcertificate in a way..

Ok, I buy a job posting product. All this needs to know which url to a certain jon posting you do mean during this shopping session. (Attributes!!)

Under your created job posting which is published only to be seen by author and role "view special job postingS".. unchecked yet: After the ordering procress all folks with this role, the shopper guest in genereal can then see it as well..

You change the flag after the order has gone thru!!!

So, all you need to do is to alter the uc_attributes function by adding an if statement so that only attributes are shown for porduct type job posting that are made by the current viewer.. Goal: Only one current attribute offered..

Ok, all we need is a module offering a link under your job posting nodes created and only seen by you the author prior to order complete status. this then writes a new attribute into the attributes table (I think what we could even do is to use attribute option adjustments and do it like author id + job posting url = sku)

Done.