I see there is a used Magnaflow Catback for sale with the Magnapacks and 4 inch rolled tips. This is the set up I want. The person who is selling it has it all welded together though...can anyone for see any problems with this already being all welded togethter? Supposedly it is all set to go on an 04 Vert..and looks good. He is going to polish it before he ships. Also..what do you think a fair price for this system would be used. I think he said 4000 miles on it..but, could be wrong...