it probably has to do with the power supply.
the default power supply that comes with the case is 230W and is also not AMD approved for their Athlon\duron processors (well, actually the motherboards)
the vendor that you cut and paste that out of probably replaced the default with a power supply that is AMD approved.
if that is the case, then the approved one should actually cost more.
tell me the price, and i'll tell you if it is worth it.
i picked up a 7237 at onvia without a power supply for less than $30. the antec 300W is like $40. so...