If you are selling separately make sure that the auctions end in the right order. Ie camera body first then back, finder, lenses...
Now someone that would like to buy a body and a lens can bid on both. If I loose the bid on the body I can retract the bid on the lens. If the auction on the lens ends before the body I will not bid on either as I might be afraid of being stranded with only a lens.

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Mats