AMD has released prices of its Sempron processors, including the 64-bit lineups featuring the Socket-754 architecture. AMD Taiwan has indicated that Socket-A models are more expensive than the Socket-754 ones in the price list because it hopes to accelerate the transition between the architectures.
Unit prices of 32-bit AMD Socket-754 processors are US$9-10 cheaper than the Socket-A Sempron ones. In addition, the price gap between the 64-bit Sempron processors and 32-bit ones with the same architecture is only US$3-6.
These actually don’t seem to bad for a budget processor. Check out the posting at PC Pro.