Middle eastren jobs
Date:
If bidders or buyers aren't given this detail within the auction description, they may become suspicious that the seller is hiding something, and therefore decide not to bid. There have been occasions where sellers have sold items at what appear to be cheap prices, but have inflated delivery costs to compensate, or even over compensate. Never do this!
There is no reason why you cannot say up front how much P&P will be. You can find out the real delivery costs of the company you plan to use. You can get these details from their website.
Once you have the postal costs you can add the appropriate handling and packaging costs, and there you have the figure to let your buyers know in advance that you're not hiding anything.