Two things to be wary of,
1) some 'dodgy people' will offer a buy it now (but not through ebay) to try and scam you with offers of bank drafts/cheques etc. Remember that when you pay anything other than cold hard cash in then it takes up to 3 weeks before something can bounce. Do NOT send any item before your bank assure you the payment cannot bounce in any way shape or form, get them to write it on a compliment slip so if there are any issues you can get your money back from the bank
2) Some people who have similar items try and persuade you to do a buy it now so that there is only their item for sale on a particular day/week to maximise the sale value they get(they back out after stringing you along). There are many ways to scam on ebay, it just takes someone with a devious mind like mine to work them out.
If you believe it is a genuine offer then you need to kill the item and restart it with a BIN price(be wary this costs you more, ensure you know what this entails.)
There is a dodgy way for you to protect your price. basically, tell the person that you will bid one bid short of what they want to pay( say the BIN price is £50, you get someone to bid £49 with say 10 mins to go, they offer £50. they then hope no-one outbids them in the last few seconds . They get it for the price they agreed (or you sell for more than that
). At worst, if someone outbids them and they complain to ebay you play dumb(make sure your 'friend' has no obvious connection to you, dead easy if you know who to ask
) Emails can be forged easily enough.
Technically its against ebay rules but hey, its business!!!
(Ian, posting under Julies account)