Philips AC millivoltmeter PM 2454

Philips PM 2454 B RMS AC millivoltmeter combines good accuracy with an extremely wide bandwidth (10 Hz...12MHz) and voltage range ( 100�V ... 300 V). Accuracy up to 1% fsd +/- 1% of reading. Common mode rejection 140 dB at 1 kHz in 1 mV range.
Dimensions : 236mm (B/W) x 145mm (H/H) x 298mm (T/D) Weight: 3,9 kg

How much is it worth? Instruments such as this are of little use today and not many people seem interested in them. Expect to pay £10-£15.