If you compare the same specs you should find that Macs are slightly more expensive to similar PCs.
You didn’t say what PC you found for $500, but I’m betting it has MANY differences from the $3,000 Mac. Find something that’s the same specs and you’re probably looking at a $2,700 PC, or something like that.
So are Macs more? Sure, a little bit. But it’s totally worth it. I could spend an hour listing reasons, but I think it’s just as good to say that I own 3 Macs at home and just successfully convinced my office to switch our 5 video-editing systems over to Macs.
I believe very strongly in this stuff. No other system has tempted me in the slightest in the past 5 or 6 years.
If you have more specific questions, I can answer them, but for the general “Should I buy?” question I would have to say ‘yes.’