Thirty dollars is a psychological sweet spot in e-commerce. It is high enough to suggest value (it isn't $5, so you assume the quality is decent) but low enough to skip the intense buyer's remorse of a $100 purchase.
Subscribe to or iTunes Match . For $25/year, iTunes Match scans your existing library and allows you to download upgraded versions of songs. For a similar $30, you can get 3 months of Tidal Hi-Fi, which lets you download songs for offline listening (though you lose access if you cancel). Thirty Dollar Website Song Download