Good luck guessing future value, but as for right now, by GB looks like there have only been a few sold ranging from $350-465 plus shipping. I think it will depend on who wants it when you are selling. With there not being many out there, supply is limited (in your favor), but I’m just not sure what demand is.
As for the rifle itself, it has some upgrades and has value for that, at least, for someone who wants to shoot it like any other, so there should be no problem selling it like any other.
That being said, if you want to hold on, it is a limited run and there is always that collector factor the longer you hold on.
Best of luck either way. I think it is just up to you how quickly you want to receive your “rebate” on your NF purchase.