Uniden SSE27 corded phone + cordless x 2 $135 delivered.
You get one corded desk phone with answering machine and a cordless handset. There is also an extra cordless handset by redemption! Either the same as the one that comes with it or a waterproof tough one (good for outdoors/poolside).
The same site also have the same deal with an all cordless system - SSE25 (but it won't work in a power cut which the one above will). Same price for that.
Officeworks will beat this by 5% so $128.50.
The Australian Uniden site is down at the moment but the same phones are on the New Zealand one: