Ok, I'm reading two contradictory things in this thread:
* Marks aren't available for sale, so PvE players feel like they have to PvP to get them.
* PvP doesn't give adequate cash rewards.
Players in group A, meet players in group B. We estimate the value of a mark based on the minimum possible cost of a point of durability on a ship that can generate a mark. Right now, we believe that's roughly 2k doubloons. That means that a level 50 kill is generating roughly 10k doubloons, assuming that the price doesn't rise due to demand.
Sell your marks.
I am perfectly willing to believe that we do not currently reward PvP enough; this is why we're adding more and more varied rewards to the mark exchange. Ultimately, though, we're going to be driving any increase to the value of PvP encounters through the mark system. Useful feedback thus includes: what else would you like to see exchanged for marks? What would be valuable enough that you'd be willing to purchase marks? How high would the value of a mark have to rise to get you to sell your marks?
For instance, it sounds like you believe that the amount of faction granted for marks is not enough to justify the expenditure of a mark. That's reasonable, and I'll talk over the amount of the reward with the rest of the design team and see how committed we are to that particular value (although I can promise you it's not going to rise to 1000 points

).
It also sounds like refits aren't worthwhile at an estimated value of 2k/mark. Taelorn and I will look at the designed effectiveness of those ships and see if they're out of line at that value.
The goal is to make marks more useful and desirable than they currently are. Suggestions focused on that goal will get immediate and serious consideration.