Hi Sandrah, I use eBay a lot so do PM if you need any other help.
When any of my items sell for unusually high prices it's often new members that are getting carried away by the bid process. Although you are obviously willing to pay £150 for your item presumably you'd rather not!
If you put place your maximum bid on eBay at any point before the sale ends there is a chance that an underbidder may keep chipping away with small increases to find out your maximum bid. Even if they do not reach your limit, perhaps they decide not to go any further, they have still managed to raise your price and in the process have probably bid more than they wanted just to try and win. These are the type of buyers that a seller would like - new people often = high prices
Experienced buyers know that there is always another product coming along behind - very few items are so unique that you will never see another. Because of this these type of buyers are a bit more restrained. You can check completed items to see what price you can expect to pay and then set a sensible limit. For these type of buyers the safest option is to use an auction sniper product. This means that you can bid days in advance if you like and then walk away. You don't even have to be online - the system will add your bid in the last few seconds of the auction thereby minimising the risk of a pesky underbidder!! I use
Auction Sniper. Mine is set to bid 7 seconds before the sale ends and although there is a tiny fee on large value items it's saved me 10 times that in lower purchase prices. Most of these type of sites will offer you at least 3 free bids before you need to start paying fees.
Finally don't ever bid in round figures. For instance £150 is a price that others may have chosen. You can add 1p or 50p to your bid but lots of people know that trick too. If I was prepared to pay £150 I'd probably ask myself - am I prepared to lose it for a fiver? No - then go to 157.68 or something equally odd. Always go just a bit above your final figure in odd numbers. Someone may still outbid you but at least you gave yourself the best chance.
Good luck