Determine what your inventory is worth retail, wholesale and as a donation write-off. Calculate the costs to sell it retail and determine what your net return will be on each of these three liquidation methods. Set retail prices for the first week of a sale, then lower prices for the final week after your initial rush of bargain hunters has made their first pass. Set your starting bargaining price for selling your inventory in bulk and your bottom-line price for lots before it’s worth more to donate it.