I agree with what Luc said about having all of your cards visible: base, inserts, parallels, gu'd, autos and high-end. For instance, I need so many Zetterberg and Yzerman cards for my main PC it is ridiculous. For this reason, I am willing to trade down for stuff I need (within reason). Try using the inventory tool and listing everything you have. You will open yourself up to a lot of player collectors, such as myself.

I am in this because it's fun, not to make profit. I have a full time job, I am a full time dad, and I go to school part-time. I have no time to run a business! I enjoy making connections and having fun. This is a stress reliever for me, so when I start to get stressed out with a trade I tend to shy away from it.

I am getting off topic here so I'll just shut up now