The best way to get away from the completion, is to bundle your products.
If it is a camera, throw in a free card, or a carry case.
This makes it really tough for any one else to jump on the listing, as long as you make the bonus item fairly unique and sell the bonus item at just above cost.
Also, since you have creative control of the listing, edit it yourself to include the bonus. If your competition does not see the change, their customers will be mighty pissed off.
Hope that helps.
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