My dad and I went halvesies on this.
Quick story: Found it on Craigslist. Guy built it for his grandson but either lost interest or didn't have the time for it.
Tamiya Knight Hauler 1/14 Semi
MFU (lights and digitized sounds controlled from transmitter)
Box trailer
Motorized trailer legs
Custom trailer graphics
RTR with Futaba 7 ch. radio
Oh, did I mention the price? $350.
Got it home and discovered a bad transmitter battery. Rebuilt the pack with AA NiMH cells and it's good to go. The cab had been partially painted but other than that it was fully operational. Auto-hitch/unhitch, sounds, lights, 3-speed, all of it. Building would have been fun but here we have instant gratification and none of the assembly headaches.
It is full of awesome.