Hi, here is a bit more advice for you (depending on which domains are you selling), if your domain is tech related - flippa would be the right platform, afternic.com its another good platform but if you have brandable domains then look up BrandBucket.com or Namerific.com its another good one, outbound calls if you comfortable with and good at it, not everyone liking, but this way you know you targeting start-up's, end user, and if you successfully close the deal you get nicely rewarded for your hard work.
hope this helps, regards