http://store.avalon-asics.com/?product=avalon-asic-unitThe site sometimes show the current option:
3 modules 63 Gh/s, without ATX power supply: 88 BTC
3 modules 63 Gh/s, with ATX power supply: 90 BTC
4 modules 85 Gh/s, without ATX power supply: 113 BTC
4 modules 85 Gh/s, with ATX power supply: 115 BTC
But it's not possible to order already and the prices may not be the final ones.