(Aloha, OR)  --  Police say a man who was the victim of a robbery was able to pull off a shoe of one of the suspects while being dragged about 100 yards by the getaway car.  The knifepoint robbery happened on Southwest Donna Court in Aloha  around 7:00 last night.  Police say the victim was selling an iPhone through OfferUp when one of the two suspects who showed up for the supposed sale displayed a knife and took the device.  Authorities say the suspects, described as two Hispanic men, were in a tan 2003-2004 BMW X5 with no license plates.