I had a buddy that bought the magnaflow Magnapacks and said they were to loud for him so he sold them. Then bought ones like yours. He sold his cat-back for around $250.00 I believe. Just sell them for as cheap as you can without feeling you give them away.
what mufflers do you want?
you could either weld some in or buy a whole new catback. I bought just my magnaflows for 150 new, so if you sell just the mufflers i think you could get 100 pretty easily if they are fairly new.
I have the regular Magnaflow catback system, theres almost 3000 miles on them. I went to a custom exhaust shop and they put it together, its all stainless steel 2.5" pipes with a black protective coating on the tailpipes. I have 4" double walled custom tips, kinda like SLP. I want to buy Bassani's, thats what I wanted in the 1st place but the sales guy talked me out of it. I thought about buying just the mufflers but I was worried about it not welding in right. I looking to sell in the next month or 2, just researching right now.