Holy shit, why are people so concentrated on the price??
Make sure the boot FITS, so your wife will have a good time on the hill and won't complain. Boots are the single most important piece of equipment you have, considering it is the only piece that physically touches you.
Who cares if the boots are priced relatively high or low...MAKE SURE THEY FIT PROPERLY. That is the risk you take when buying online...are you willing to roll the dice?