I'm in the market for Klipsch speakers and I came across a pair of KG 4.5 for $300 on CL that are in excellent condition. The guy is pretty firm on the asking price, and it seems like quite a bit more than others have paid for the same speakers lately. That being said, is $300 still a fair price (assuming they're truly in excellent condition)? Especially compared to buying new speakers, it seems like it's still a very good deal. I'm looking to power these with a vintage Onkyo TX-4500. I've read up a little bit on the KG 4.5's and it seems like the receiver/amp is important in order to not have treble issues.My dad bought the Onkyo TX-4500 new in the 70's along with Klipsch Heresy's, and the sound quality was incredible. Based on this, I'd think the TX-4500 will do just fine with the KG 4.5's. Thoughts?