If you’ve got the post-holiday blues, why not book a Myrtle Beach rental this winter? Whether you’re looking to escape a northern frozen tundra or want to enjoy a staycation in your own city, you can save big by staying at a rental property in January, February, or March. Snowbirds, families and locals alike can get away with indoor pools, ocean views and beach access. Invite your loved ones and enjoy some relaxing time in a Myrtle Beach house or condo. Discounts are based on the change in price from booking January 18-25 versus May 17-24. Here are six rental properties with big winter savings that you can book on…