IF you donate the items, you can deduct the [b[fair[/b] market value. Ie. The hightest price that you can see it for sale at.
Make sure that you keep a copy of the item sale listing to prove you "valuation" to the IRS if needed.
If you already itemize, it may benefit you. Avoids the hassles of trying to sell the item.
If you do not itemize, you are better off selling the item unless you want a warm fuzzy. You will have to ignore the first $3-4K value of what you are trying to unload. Then based on your tax bracket, you then can only save on taxes roughly between 10-30% of the left over value.
Example.
Non-itemization
$6000 car.
-$3000 itemization level (estimated)
= 3000 tax deduction
@10% bracket = $300 extra in your pocket
@30% bracket = $900 extra in your pocket
Already itemizing
$6000 car.
@10% bracket = $600 extra in your pocket
@30% bracket = $1800 extra in your pocket