Fastest possible, 3 day fixed price or a 1 day auction.. at a low enough price to catch the bargain hunters. You can pretty much flip a coin on which will happen first, but you can only have "immediate payment required" on a fixed price listing.

I rarely do auctions. People want it NOW.

Fixed price, so they don't have to wait, they can buy it now. Auction are 5, 7 and 10 days etc.

Add more to the item to cover shipping cost.

Without free shipping. Cause I can't offer free shipping anymore cause it is costing me too much money. So should I put it on "auction" or "fixed price"....so,which one will be faster?