Like the previous poster said, it depends what the names are. If they are top quality generic .com domains then your best bet is probably contacting a domain br

Like the previous poster said, it depends what the names are. If they are top quality generic .com domains then your best bet is probably contacting a domain broker. If they are just average names from an abandoned project you could try any of the regular domain forums. Domain sales on Ebay or Flippa actually do ok too.