Here are fews eBay tips that might help you.

• Seek clarification. Always seek clarification before place your bid. Read the listing description carefully. Ask for more information or additional photo if the description is not clear.
• Always consider postage cost before placing your bid. Remember, the total amount that you have to pay will also include postage.
• Dont get into bid war. If the price go beyond your limit, just let it goes. There will be another day to bid.
• Do check the seller track record. Click on the numbers located next to the seller user ID. Here you can find all the comment from the past transaction. Just becareful if the seller has too many negative feedback. You may want to check the comment individually.
• Pay with paypal. They provide buyer protection scheme.