The short answer is no. Sites containing pirated or copyright infringing material or sites based around linking to pirated material (e.g., pirated software torrents) are not permitted for sale on Flippa.
Flippa can not be the judge of whether or not an individual website violates copyright. We are not lawyers and we do not actively monitor sites listed on Flippa for copyright violations.
What this means for buyers is that they need to take potential copyright claims into account when valuing a site. If buyers have any concerns about potential future issues, they must get independent legal advice before making a purchase.
What we can police is the seller's claims about Site Uniqueness. If the seller claims that the content or design are unique, and you have reason to believe that they aren't, please contact support directly and we'll investigate the seller and the listing.