The principle of a reserve is MO(mentum). In a rlive auction house when bidding 'gets going' it has the momentum to take the price higher: if bidding starts at a high (starting) price then fewer bidders join in and the interaction - competition never gets going.
With ebay it's not really thesame: lots of auctions happen in the last five minutes, so other constraints apply - will this bid arrive by the end time, for example.
So as a seller, if you have a real minimum price, then put that as the starting price: if you like the gamble, you can save ebay fees and have a lower starting price in the hope of exceeding your real lowest price in the bidding.
Then there atre those who sell the item for 50p and charge £8.75 p&p; that's not really allowed of course.
ebay fees (press the 'show' link against reserves) says that reserves are only allowed on items of £50 and up and it costs 2% (£1 on a £50item) which is only charged if the item doesn't sell.
I always just work with a starting price as the minimum I'll sell the thing for and avoid the complexities.
this forum might have useful selling info.
this selection has some question which are the same as yours.
Have fun.