The donation value is the current fair market value, or what you paid, whichever is lower. The current fair market value takes the condition into account (used?) and is rarely the same as the price you paid.
Then, the amount of tax you save will be between zero and 32% of the value, depending on your other itemized deductions and your overall income. We can’t be more specific without knowing your income, other deductions, and filing status.
