Bart,
The everyday price is $20. Go to the ecology center in Rialto or Fontana. The last time I was there they had a pile of fans in a bin and I just grabbed a 2-speeder and walked out after paying $19 something for it. I also bought another one later, as a spare, that I removed from a 91 Taurus. There were several other cars with the same fans also. Just make sure the fan is from a 3.8 liter, has 3 wires, a ground, a larger and a smaller gauge wire.
Hanns