Shipping bucket seats?

Hi, I have a person hundreds of miles away that wants to buy two front bucket seats from me. They are entire power seats -- seat base with motors/trim and leather cushions. They weigh around 40-50lbs apiece I'm guessing. I really don't want to spend a lot of time readying them for shipping as I'm nearly giving them away just so they find a good home. What's the easiest and cheapest way to get them moved? I thought about a UPS Store dropoff but I know that's the most expensive route for the buyer. Any help is appreciated.
Fastenal or Greyhound usually comes in Cheapest.