that is a good rifle that was linked, but if you want some advice from a 3 year airsoft player, dont go with a sniper rifle, in real life the advantage of them is to be able to shoot from a long distance away, and the downside is in some cases the bolt action reload, low mag capacity, heavyness and over lenght of the weapon. in airsoft an m16 or mp5 or basically any aeg will shoot just as far as the sniper, putting more rounds down range, and overall being lighter, quicker and more efficient.
if ive managed to change your mind here are some links to excellent guns in your price range
http://www.airsplat.com/Items/ER-XL-AK47-0506.htmhttp://www.airsplat.com/Items/ERM-JG-AUG-448A.htmhttp://www.airsplat.com/Items/ERM-JG-G36C-138.htmhttp://www.airsplat.com/Items/ERM-JG-M162-607.htm