Any tips for selling items?

[spectrefax]

I don't get to auction my wares in EC tunnel often, but when I do, it usually results in about 30 mins of spamming followed by vendoring most items (I usually only have low/mid-level items, no big ticket stuff).

I'm very rarely successful in selling anything in EC unless I sell the items at 25%-30% of their normal value, and even then that's pretty rare too. Can anyone offer me any tips to help me move my items?

P.S. I'm a casual player, so I often don't have time to sit in EC tunnel for hours as I prefer to spend my available game time playing. Thanks!