Another aspect to consider, is the volume of personal items that you would likely be shipping. If you have a ton of clothes, bedding, books, personal effects - more than you could shove into a car - then the shipping option becomes more attractive.
Based on my experience, no matter how new, how nice, and how much you paid, when you sell furniture it's almost like giving it away. If you like your stuff, and the cost is not prohibitive, I would ship. Been there, done that multiple times (US-UK-US-UK and UK-Portugal-UK).