Is this good enough? http://www.jammerall.com/categories/GPS-Jammers/ http://www.jammerall.com/categories/GPS-Jammers/ Low-cost GPS jammers are $30-$50 dollars

Is this good enough? http://www.jammerall.com/categories/GPS-Jammers/ http://www.jammerall.com/categories/GPS-Jammers/ Low-cost GPS jammers are $30-$50 dollars, though they are illegal to sell or to use. Jamming is a simple matter of sending out a signal more powerful than the signal received from the satellites. 100mW transmitter is more than adequate in close range.