I recently bought a spindle of 25 blank CDs for 10 euros - about 15 US dollars.

Selling bootleg CD on the streets used to be part of life here, and officials were on the lookout for movements of large quantities of CDs (Unless they had an "arrangement" to not be on the lookout....)

But that doesn't happen any more - maybe cheap Russian downloads (which are very popular here) killed the trade. Anyway, I can't imagine any official being remotely interested in your CD collection or downloading activities unless you're doing something extremely unusual.

Shop-bought CDs are insanely expensive - around 20 euros/30 USD for a high profile recent release.