Spink and Son Ltd was founded in London in 1666 and has since developed into the world's premier collectables auction house. It specialises in the auctioning and private sales of stamps, coins, banknotes, medals, bonds & shares, autographs, books, wine & spirits and lifestyle collectables.
That's only a problem with modern or UNC coins that would show signs of being handled, most of these coins have been buried in the ground for 2,000 years, handling them isn't going to make a difference.