Can i sell my copyrights?

[bcnu]

The potential value of your copyrights is probably fairly close to zero. You have already published things, so copies are already out there for the public to read and discard/sell. If you were to find anyone infringing your copyrights, that might be worth something, as you could (in theory) sue them for damages. There are actually companies that buy rights from others to sue infringers, but it's a narrow niche.

Your trademark, on the other hand, may be quite valuable within your market and there are literally volumes of business and legal books that discuss the mechanism for proper appraisal of trademarks and their associated good will.