On Ebay there are many offers like this one:
http://www.ebay.com.sg/itm/WINDOWS-7-PR ... 4187b187be
For this particular one I understand the licensing workaround but I have problems to believe somebody sells relatively new system (in terms of the generation) for probably 1/4th of the price. Do you think something smells here bad or it is entirely possible somebody could get OEM versions of such software at such low price? Note that this is not a single recovery disk coming from a single dell pc but this person sells many pcs of it.