Scratchy volume and tone controls is usually just dirt/oxidation in the pots. A quick cleaning with De-OXIT will usually resolve the issue. Just do a google search for "cleaning volume pots" and you'll find plenty of information on the subject.
If you like your receiver, you probably don't need to replace it. It may just need a little service.....
If you like your receiver, you probably don't need to replace it. It may just need a little service.....