Not the cheapest this has ever been, OzBargain, but this seems to be a reasonable price for a mid range keyboard. The RRP for this keyboard is heavily inflated. Being sold around for around $149.
Product description:
* Warp Wireless Technology gives every game a reliable and consistent 2.4 GHz connection with Zero-Lag technology
* Lightning fast CHERRY MX Brown Switches with a 1ms response time
* Up to 75 hours battery life
The RRP makes it look like it can compete with corsair k100 which to me is the top range mechanical keyboard .