Cost of finding a gem amid the bargain bins:
Cost of download: £10 for 2 x 100 tracks
Ratio worth keeping: 1/10: i.e. 20 good tracks
Time to find: 20 minutes (£2 at minimum wage)
Cost per good track: 60p
Cost of finding a gem amid expert reviews:
Cost of download: 99p each (or more)
Ratio worth keeping: 1/2
Time to find: 30 minutes each (or more) (to find reviews, then read reviews, then compare audio, rinse and repeat)
Cost per good track: £2.50
If my time is valued higher then minimum wage then the difference is even greater.
I am hoping that, as per normal economics, the bargain tracks come from a number of sources. I accept that most will be created as cheaply as possible, but hopefully some will be high quality but sold cheaply due to the rights owner choosing to focusing their marketing dollars on a small range of more fashionable works.