Donations between $501-5,000 require a record of how and when the items were acquired and their adjusted basis. When you determine the amount of the donation, you research what each item would sell for if someone were actually going to buy it from you.
You research by looking at online sales sites like eBay and also looking for classified ads of people selling the item or wanting to purchase it.
Keep a record of each item with date and price acquired. Then keep records of the research they you did to determine the fair market value of each item.
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