Look at the prices for them on Ebay and you will soon shed the notion of getting any "cheaply". Desirable DVD-A and SACDs of classic rock albums were "mainly" issued between the years 2000-2007, they have not been available at retail sources for several years now. That said, there are a few that seem to be released each year still, (ELP, King Crimson, Wish You Were Here) and I'd get those before they join the ranks of the unobtainium discs....unless you don't mind spending $100 for a disc that originally cost $20. I don't mean to be a "bubble burster", you can sometimes stumble upon a desirable disc in combing the used CD stores. There are a couple of the early release DVD-As I'd still like to get but I'm not holding out much hope, unless I desired to trade away the copy of my E. Power Biggs SACD I bought for $12.....but then I see that $314 Asking Price copy on Ebay and figure its doing much better than my 401K. John