This is the cheapest “big” delta I can recommend.  At 11ft wingspan, it makes a big impact in the sky, and has enough lift to hoist plenty of tails or line art.  The Shazam is made of ripstop nylon and fibreglass spars. Some other deltas this size have carbon spars for lightness, but the Shazam is capable of flying in winds as light as almost any rival can manage.  A very reliable kite and ideal for anyone who wants to get into bigger kites without spending a fortune.  It does tend to flex a lot in anything over light breezes.  Price (2012) is only $70, from Gomberg Kites or G-Kites.