I would ask for more pics, and also ask him where the rudder/vert stab is. Definately not a cub. If he/she doesn't want to provide you with any more pics, then thats a red flag & stay away. You can get some great stuff on ebay, but you can also get total junk. It also depends on how much they are asking for it, what kind of receiver, servo's etc. If its a decent receiver & servos, the asking price may be worth that. Although if he's calling it a Cub, he might not know what the servo's etc are. As always "buyer beware"
Joe