Selling 6 domains and a website about rip off insurance

I have a group of domain names and a website for all kinds of rip off insruance companies. Basically, this was to show up the bad times weve all had with car insurance companies squirming their way out of not paying when a claim is made.
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I built this for my brother in law who started out enthusiatic about it but then found other projects. I never got paid for it so I was told I could keep or sell the site and domains instead.
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The main site is www.ripoffcarinsurance.com and it also has bike, truck and van insurance sites forwarded to it. The logo is unique and there is one for each of the 4 modes of transport.
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I will include the 4 facebook groups and the gmail account that goes with the sites as we did start to promote it. There is about 80 members across the 4 fb groups.
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There are also a number of people who joined the site which has built in email system so you can promote to them too.
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There is also a unique certificate that people can fill in online then download and print to send to their insurance company with the wordss "worst insurance company award".
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It would be a great project for someone and I am sure there is a lot of money to be made if someone had the time to promote it.
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The domains included are:
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www.ripoffcarinsurance.com
www.ripoffcarinsurance.co.uk
www.ripoffmotorcycleinsurance.com
www.ripoffvaninsurance.com
www.ripofftruckinsurance.com
www.ripoffinsurancegroup.com