You'll have a feel for what a reasonable price is for the stuff you buy. You need the same knowledge to be able to set a price on the stuff you're selling -- especially if you're setting a reserve. The easy option is to set the start price at £0.99 since this avoids certain fees.
Before creating the listings you need to weigh each item and calculate postage accordingly (e.g.,
http://www2.royalmail.com/delivery/busi ... ail/prices). Postage bags should cost you up to about 50p each; in my listings I say "I'm adding 50p for packing" (to the cost of postage). You can offer multiple postage options; whenever I've offered both 2nd standard and 2nd signed for the buyers have always chosen the cheapest! You might want to
only offer
signed for for
your piece of mind. For international postage, state clearly to which countries/regions you will post, and calculate postage.
Give yourself two to three days "processing time". Some bidders will take a couple of days to pay, so you can cut down your trips to the post office if you can wait for a couple of days.
You need good pictures of the item you're actually selling -- not stock images. You don't need
many but you need enough to demonstrate to the buyer that your description is accurate. Describe items accurately, listing any defects. Buyers
will complain over the most trivial details -- even if they are clear in the pictures but not explicitly mentioned in the description. You really don't want to have to have eBay adjudicate over a dispute.
A good time to end auctions is Sunday evening -- how many of us spend time on a Sunday looking at crap on eBay?! Similarly, weekday evenings (not too early) are good, but late night and mornings are bad. Therefore you start your auction 10 days (or 7 days, or whatever) before you want it to end.