One pair of used Event 20/20 Passive studio monitors.

In excellent condition - bought new in 1998, and only used in my home studio.

These are great studio monitors with a relatively flat response curve.

Specs:

• LF Driver: 8" mineral filled polypropylene cone with 1.5" high temperature voice coil
• HI Driver: 25mm ferrofluid cooled natural silk tweeter dome
• Crossover: 2.2kHz second order
• Freq. Response: 50 Hz - 20 kHz +/- 2 dB
• Pwr Handling: 150 Watts RMS each
• Nom. Impedence: 4 Ohms
• Sensitivity: 88 dB @ 1 Watt and 1 Meter
• Weight: 22 lbs each

From a review by Sound on Sound:

The Event 20/20s are quite compact, measuring just 14.75 x 10.25 x 11.75 inches, and they're obviously designed to fill the need for a nearfield monitor, though they deliver quite enough bass end to be used as main monitors in a small studio or edit suite.

These monitors are rated at 200W peak, 150W programme, and have a nominal 4Ω impedance, though they're efficient enough at 88dB@1 Watt @ 1m that you could monitor quite loudly with an amplifier as low as 50 Watts per channel, or even less.