But you got paid and so did the seller. The seller did "wrong", not me; why should I give it back and not be compensated? You can buy it back from me for the full retail price that I paid plus taxes.
With a stolen car when you buy it, you did not do even the most basic of due diligence so there it is understandable. With most other products you cannot do due diligence. Comparing this to stealing makes the case in point though; the original user did not read the small print should be treated vastly different than going out and stealing something.