I download quite a few, admittedly MP3s, not FLAC, my ears are not as sensitive as they were, (mainly loss of higher frequencies) so I'm satisfied with MP3s; I use mainly Amazon or Baroque Music Library, Amazon prices vary considerably, but I don't recall getting any where near a tenner. maybe £7 or £8 max, more often around £5 -£6
BML are $5.99 for all single or double CDs, only a small list - about 130 titles- but as the name suggests all Baroque, but some real gems, Bach organ works played on various Silberman organs, Baroque English composers Purcell, Boyce Croft, & Stanley, plus loads of continentals. However there are some Harpsichord recordings, so for you not 130 titles