Magnaflow Exhaust 15684

I AM THINKING OF PURCHASING THE MAGNAFLOW CATBACK PLUS CAT CONVERTER ON EBAY FOR $330.

HOW MUCH SHOULD I PAY TO HAVE WELDED IN AND ANYONE HAVE A PLACE I CAN GO?

I AM NEAR MT HOLLY NJ

http://web.camaross.com/forums/showthread.php?s=&threadid=277650&highlight=exhaust