Zealot

Hi,Im new to the forum and have yet to build my first model. I was searching for free models and saw a site which I thought had free models but they were actually built models of free downloads for sale. The models were many I found on this site for free but way to complex for a builder like me. However I did like one of the models and figure it will be a long time before Im at a high skill level. Would I be wrong in purchasing this model? Does this person have the right to sell a free downloaded model that he built?