So...Long story short - I have an awesome wife, but an extra optic. I have been building a couple of rifles for about a year + now. She bought me a nice Nikon optic that I will be mounting instead of the Vortex StrikeFire red dot. Should I hold on to it or sell it? It has never been opened, brand new in box, what could I expect to get out of it? Trying to decide if its worth more to be as a backup or as cash to spend on ammo.