Trap sheds? Check. A working lighthouse? Check. Bungalows, cottages and McMansions? Triple check. 'Tis the season for a virtual trip to the beach in search of single-family abodes in the sand that won't break the bank, relatively speaking. Hence, here's an updated map of Cape Cod's least expensive beachfront listings, by town, with 15 sandy abodes asking $459,000 to $2,395,000.