hm, I probably should check now, but were I live (non US), the last time I've checked zigbee prices started from 19$ :( But still the best thing will be that:

hm, I probably should check now, but were I live (non US), the last time I've checked zigbee prices started from 19$ :( But still the best thing will be that: - you will not need any dongles - can embed your project immediately - better compatibility with hardware and software (hopefully) :)