There's nothing particularly illegal, immoral, or crazy about buying a used CD. However, I'm not sure asking on a notice board is the easiest way to go about this.
Is there a reason why you ask here? Obviously, you have internet access, which means you also have access to sites like Amazon or Ebay, though you may not have the means to purchase these items online. In that case, try used CD shops or old record stores.
i have found these cds elsewhere, but at ridiculous prices and was wondering if anyone on here would have some cheaper ones, but i think i already found a cheaper place, so pretend this thread never existed
If you want Queen cd's try the deepdiscountcd store. They have nice prices on all items, and even free shipping within US. I have to pay postage, but it's still the cheapest way mostly if you want new cd's.