If it has a good cartridge, and the lid is in excellent condition, these can start sneaking up to the (equivalent) $1000 mark !!!
If the voice is distorted, you may have an issue with the cartridge - or you may even have it connected to an amplifier with an RIAA already inbuilt. The 7000 deck has an RIAA pre-amp inside it already, and if you connect it to say a BeoMaster 5000, 5500 it will distort like mad!!
Lee
BeoWorld - Everything Bang & Olufsen