Melt them into 1# blocks and offer them on the St Jude Auction here, the listing has just opened. You could have the winner send you the shipping costs. I mailed a 1# package ( M/L round ball mold) yesterday, priority mail was $8.46, they don't do first class much anymore as it is often the same as priority. You get free boxes for priority as well, a flat rate box would be good for multiple pounds to one person.
If you do this be forewarned, CONUS only, nothing to Canada. I donated some books to the auction, the winners were in Canada, the books brought $30, seems like shipping to Canada was $45 out of my pocket, no media rate up there.