Muffler shop wanted $600 to repair 03 vibe. Another wanted $100 to bypass it. So, I chose the $100 option, not fully understanding things. Now, trying to sell it, when I say converter has been bypassed customer loses interest. I see there are some on eBay for $125. What to do? I feel i have to tell them. Is it better to just buy the $125? What problems could show up from bypassing it? Thank you in advance..