Big-ticket real estate auctions could thin Grand Strand market (The Myrtle Beach Sun News) Ever wanted to own piece of an island? Well, here's your chance if you have enough cash. Iron Horse Auction Co. is scheduled to sell five lots that make up about a third of Monk's Island, N.C. - and the only developable part of it - at an auction this month. The island is at the Shallotte Inlet between Holden Beach and Ocean Isle Beach on the Intracoastal Waterway.