Client,

First, do not worry about the limitations, IRS audit samplings or staying under government radar.  If you make donations, properly document them, and take the deduction that you are entitled to take..

For larger non-cash donations, such as your, gather and keep additional documentation so that if it is ever questioned, you can more than support your deduction beyond the documents that are given to you from the donee.

Additional documentation would be original receipts, photographs of items that were donated, written pricing comparisons in the newspaper, craigslist, etc....  This combined information is unquestionable prevailing substantiation during an IRS audit.

I hope that this helps

Doug