hi, i have just picked up a sanyo denki servo motor

can anyone tell me more about it, model number v730b-412el7

i dont have the sanyo denki amplifier, is there an alternative driver like leadshine that i could buy for it

300w 75v 5.2a 2500min-1

what would this motor normally be used for? and how much could i sell it for if i dont come up with a suitable use for it

i found this listing on ebay : https://www.ebay.co.uk/itm/V730B-412...QAAOSwwqBZ4IUn

why is it so expensive