Sorry if this is the wrong place. I have a msi gaming 100 million edition gpu. When I bought it 3 years and I paid $380 plus a $20 mail in rebate. A couple months ago I was thinking about running sli with 2 of these cards. I was shocked to see it priced at $600 plus. I also see that many of these 970s are also $500-$600. Why are they so high cost now?