Inspect the tools for rust, scratches or other visible signs of wear. Yard sale shoppers look for anything they can point out to haggle down your price. Rust is removable and scratches can be buffed or painted over to increase your asking price.
Test the power tools. Dull blades, insufficient lubrication or damaged motors will dramatically affect the price you can expect to charge. Any repairs the buyer has to make to have a working power tool, including replacement blades or drill bits, needs to be factored into the price.
Look at new tools of the same brand and assume the most you can charge is 25 percent to 50 percent of the new price. If the current new price is $100, you can expect between 25 percent and 50 percent, so about $25 to $50.
Look at websites, like eBay and UsedPrice.com, to find out how much other people are charging for comparable power tools.
Consider package deals. You are more likely to get a higher price for your circular saw if you include the six different blades you have than if you try to price the blades separately. The goal is to get rid of the large piece of equipment, not the skinny blades you could easily throw in the trash.
Decide how little you are willing to sell for before you put the power tool in the yard sale. Shoppers come looking for bargains and may offer you less.
Set your price 10 to 20 percent above the lowest price you will accept and round to the nearest $5 or $10 increment. For example, you will take $20 for your battery-powered drill, so set the price at $25.