(This may be because the next version of Office for Mac is coming out later in the year, but I am quite a fan of the current version!)
Office for Mac 2011 is normally priced at $169, but my 'daily deals' newsletter from EStore shows they are currently selling it for $134.
Visit eStore to see this deal.
(Please note. eStore has not paid for iTandCoffee to advertise their site or products. This is an independent recommendation.)