Could be that your first sales experience was poor because you're very new here. I notice you didn't get any feedback from that sale, did you give the buyer any feedback? (That's rhetorical, because I see nobody posted in that thread, therefore no feedback could have been left for either party.)
Generally, brand new members that show up here just wanting to sell aren't always welcomed with open arms, because many like that are only here to scam. We've seen it all too many times.
Maybe take part in the community for a little while, then try selling some of the knives a bit at a time? This is likely to net you the greatest profit, but will certainly require some work. If you don't care to become part of this little community, than don't be surprised if the community isn't willing to take a risk on buying knives from a brand new member like yourself.
PS - Emerson knives tend to be a bit divisive here, so that could also be part of the reason you had trouble with your sale, FYI.