Shipping floor standing speakers


I have a brand new pair of PSB Imagine T2 speakers I'm going to sell. Can anyone tell me how I should ship them properly? They have never been opened and in original packaging.

Thank you
128x128easola01
Thank you. Chris the back story is I traveled to an audio store several hours away. I bought an integrated amp, turntable and these speakers.

Before I even opened the box I changed my mind and decided to upgrade significantly...on all components. Thus my situation!
  How far is the shipping location?
meet halfway.?  
   We went through 4-5 pairs of Energy rc-70’s shipped, ups and fedex were used, 
bases wrecked, sides cracked, puncture holes in boxes.
took. Me about 5-6 months receiving, and sending back to get a good pair. 
  It’s a shame, all those great speakers destroyed in transit.
ups and fed ex guys are all morons, they don’t care, dropping the boxes off the truck to the street, 
    I’m sure the boxes was adequate, but the delivery guys were mindless, idiots!

good luck w shipping.
I would triple box w padding, more padding on a pallet for safety. 
If my experience is typical, don't ship UPS.  They'll find new and interesting ways to destroy your speakers.