If the condition selected is "Used", it is expected to be in working condition. Nothing the seller says in the description can change that. If the seller wants to sell it "as is", without warranty or buyer recourse, he has to select "For parts or not working". Its as simple as that.
If you paid through Paypal, you may be able to recover through them. Although having spent money on repairs certainly complicates things. When I bought a receiver that turned out to be defective, I got a ballpark repair figure and asked the seller for a credit in that amount, after getting the credit I then got it repaired.
What if there is no condition specified? What does that mean? There's a Kenwood 700M listed now that is a bit questionable, and the condition says, "--". Seller also says, "No returns. No exceptions."