Hints on how to sell on A'gon?

I've been buying stuff on A'gon for a few months, and - inevitably - now I need to sell some stuff. Having looked at several thousand ads, I've developed a sense of what appeals to me (pictures, clear and honest descriptions, links to more info) and what doesn't (hype, opaque language, non-existent zip-codes).

But I wonder if any of you more experienced A'goners might offer tips on the best way to get stuff sold. In particular, I wonder if there are particular days of the week or months of the year that are especially good for A'gon sales. But any advice would be welcome. Thanks.