Depends what it is. The phone I sold was on a 5-day auction and no-one even looked at it until the last day. There's so many phones ending each minute, that's there's no point looking for earlier auctions. Anyway, after 4 days (still no bids), eBay took my phone auction down because they are a bunch of tools and interpreted "not a link" in my title as "search manipulation. Anyway, I just put it up again on a 24 hour auction and got the expected amount. However, I also just sold my guitar FX, which is a lot rarer, so I put that on for a 10 day auction. The bids and number of people watchin went up very slowly, but steadily over the whole 10days really. T
But yeah, it definitely helps to write a good description and have the auction end on a saturday, or at least an evening (Y)