Thinking about it I have a rocket Fett that looks the same as this one. I bought it years ago, a short while before hasbro released their version of this figure. It was on a sealed card back and had a die cut section on the back of the card that could be popped out so you could see the rocket firing mechanism. It may well have been a Poon job, I can't remember but I know it was before he started putting out those all blue rubbery rocket Fett's that came in a box.
I'm thinking this could be one of those sealed Fett's I have that's been opened as it was really well made and I don't think any loose ones were made like this. Just a thought but it seems so unlikely that this listed one would be for real. As a side note I have seen rocket Fett's up on eBay but they're always graded and come with a huge BIN, maybe one did get sold by mistake back in the early days of eBay but I doubt if something like that could happen now a days with the amount of people trawling through eBay every day.
Ian