Well, given you like the artist and want it, I would suggest a price based on the number of tracks. Let's face it these days top artists take years (why!) to come up with one album with a paltry few tracks and charge the mandatory £12 or so. So why not £5 for a minimum 5 tracks and 50P for every track after that and a Max £7.50 for a new CD with 10 or nore tracks. And a Max £5 for 'best of' albums which more often than not are hardly worth that, after all if you already had bought a book would you expect to pay full price for a second copy?