Are there companies that do audits or product buy backs (not sure if this is the right terminology)? I did mystery shopping and merchandising in England and I use to do stock and price audits and sometimes I would go check certain products and if they were in a batch that the company wanted to recall I would purchase the product and then destroy them.
The majority of merchandising I seem to see is for product demo or resets.
Also, click on the "More About Audits" link right under your post and try doing a search for "buybacks" "all dates", which you can access on the main page.