Your yard sale is going to depend on the type items that you have. There really isn’t a set number to charge when it comes to your own yard-sale. I would recommend not to charge the price that you paid originally because the items depreciate as soon as it leaves the store even if you’ve kept in the best of condition and buyers may get turned off. For example if you have a sofa and you’ve paid $300 and you’ve have for at least 2yrs. you can charge $100. Some people charge $1.00 for whatnots’ and other minuscule items. Some people need the extra cash so charging small amounts is ok.