A while ago I purchased one of these faux Parker pens in RB style. It's quite nice and uses real Parker refills. It'd great for etc and if you lose it you're out only $5.00.....
There was another seller of these fake Parkers, I saw one of his products and it was a well made fountain pen, although there was an odd description by the seller in that the pen would take Parker cartridges or SIC, which is a good trick.
Parker have agreed that the pen shown in the listing above is not a Parker, although the seller swears blind that it is the genuine article. My suspicions are aroused as his pen is one 7+ that he has sold, all identical, no box or a Parker warranty.
You need to take a view on whether it is acceptable to buy a fake item, described as genuine, as this encourages the trade in what many see as a criminal/illegal activity.