Well being as very few people have access to a 3 phase supply at home, a new 3ph/7.5 motor can be had for 250/280 quid from Fleabay.....I reckon whatever someone is willing to offer you (0.99 start on Fleabay?)....personally I'd charge you to take it away.....you might get a motor rewind place to take it as spare parts/rebuild unit and they might give you a few quid if your lucky...basically scrap value.