This Yamaha StagePass 300 Public Address (PA) system has been tested and sounds outstanding.
 
This system includes a Yamaha rolling storage case so it is easy to transport. It also includes cables to power the system and run the included microphone. Also included are two speaker stands, speaker mounts and the mixing board which mounts to one of the speakers. The mixer can be removed for easy access during events.
 
Pickup is in Melbourne, Florida, USA or shipping is available.
 
Here's more from one retailer:
"An affordable complete vocal PA you can carry from the car to the stage in one trip!
 
Yamaha's Stagepas 300 is a surprisingly compact yet reasonably powerful stereo sound system comprising a pair of moulded, passive two–way speakers and a small powered mixer that stows into a recess in the rear of one of the speaker cabinets for transport or storage. The other speaker has a similar recess with a removable cover for stowing cables or mics. According to the specifications, the mixer's dual power amplifiers can produce 150W per channel into 6Ω with 10 percent distortion or 100W per channel with one percent distortion. Given that the system's mixer-amp is little larger than a decent box of chocolates, that is quite remarkable. 
 
Speakers Corner
The speaker cabinets, which measure approximately 18 x 11 x 10 inches, are moulded from a tough, resilient plastic with no obvious resonances but, unusually, they don't have a pole–mount fitting built in. You have to buy external stand adaptors as accessories if you wish to stand–mount the speakers, which seems rather odd to me, as how else would you use them? Both speakers are identical, so either one can hold the mixer amp while the other can be used to store the supplied speaker and power cables or a couple of mics.
 
To secure the mixer into the rear of the speaker, there are two twist locks that can be opened with any suitable coin, and the mixer is stowed 'controls out', so that it can be used while still fitted to the speaker if necessary (although the front panel would then be 'sideways on' to the user, if the speakers were being used upright). I'd prefer catches that didn't require tools to open, but even musicians tend to have the odd coin about their persons and the catches actually work very well. All the connections, including the IEC mains inlet, are on the top of the mixer.
 
The cabinets, which are quoted as having a 55Hz to 20kHz frequency response, each contain an eight–inch mid/woofer speaker and a one–inch HF compression driver feeding a moulded horn flare. Passive crossovers inside the speakers operate at 4kHz, and a strong, perforated–steel grille protects the cone driver. (This may be a budget system but it is built to the usual Yamaha standards of engineering.)
 
The amplifier's response extends down to 20Hz and up to 20kHz (–3dB/+1dB), measured at an output of one Watt and at a distance of one metre. Maximum SPL is a respectable 112dB which, considering that the whole system weighs only 18kg, is pretty impressive. A preset limiter, with corresponding red LED on the mixer's front panel, is included in the amplifer section to protect against hard clipping."
 
Photos are not of the actual item, but accurately reflect the condition and style of the PA system for sale here.