You can't resell stuff like that to some poor unsuspecting individual, so I hope you meant you couldn't pass it along to someone else.
Even cleaned inside and out, most people aren't going to want it in their homes. It's bad enough that you might've unknowingly introduced something you don't want into your own home (hopefully you got away with it), but you can't ask someone else to pay for the opportunity to have something like roaches infesting their own home.
You need to return the mess and demand a refund.