Not everyone uses replica optics. If you want real stuff for not a bad price one option would be NC star. They aren't top end optics, the adjustments are a little sloppy, but that doesn't matter when you are only shooting 50 yards tops. After 50 or even before, crosswind and the inconsistent drop airsoft bbs are plagued with takes so much effect that your zero becomes irrelavent.
Beyond that, alot of replica optics (toys) are actually of fairly decent quality. Especially EO-techs and Aimpoints. As far as Scopes go, I would pick up a real one, a cheap Bushnell or Pine Ridge is only about 80-100 bucks. Plus, the extra magnification is a good substitute for the extra pair of binoculars you would have to lug around.
Travis R. (aka Trapper)
Canadian Airsoft Marines. Field owner