Haven't sold myself but lots of info on ebay itself and on the web. Need to think about payment, but I think paypal solves most problems. Some tips I saw that I thought were good:
- list your item as being available in the UK (rather than just IRL), opens up a much bigger market. Might not be as important now that ebay.ie has started. Should check the postage costs to UK before posting also.
- Time the ending of your auction, apparently Sunday evening is a very busy time, so an auction which finishes then will get more eye balls.
- think like a buyer. What category would you expect to find something under, what key words would you expect to see (title is v.important), what info should be in the ad (pictures are good).
HTH