Here is a second hand pair of Mackie SRM450 Powered PA Speakers. These are Version 1's, which have become sought after due to the speakers being manufacture by RCF in Italy. Rated at 1000w peaker, 500w rms, these speakers have more then enough power for most applications.
Although second hand, these speakers are in full working order and in nice condition. The cases are a bit worn, however this does not affect the function of the speakers in anyway. See photos.
They also come with a 3 month warranty.