You have basically just dumped a ton of fish in shark invested waters, jumped in along with them saying 'I have no idea how to swim' and seemingly unaware where you are.
Summary – You are going to get a lot of e-mails from opportunist investors (sharks) asking what you have, but expecting to pay peanuts.
May advice would be to e-mail a respectable broker, let them have a look through what you have to see if any are potentially valuable so you can get top $ for those, but some brokers are opportunist investors too, so beware selling directly to them.
Check dotdb.com to see how many are regisitered in multiple extensions, if some are and you have the .com, that is a good indication the domain might have value.
Don't be afraid to get a 2nd opinion before you agree to sell anything.