Akai S 900 working £50. Akai S3000 CD Cd drive not working £50. Korg M1 rack module (needs new battery) but working £100. Roland d110 working £50. Drawmer M500 working £100 - Tascam Midizer £50 - Yamaha RM50 drum module £30. MACKIE 824 speakers MK1 one has intermittent fault on amp? also 110...