>>42409432
Well the best imo are the Ponies At Dawn physical compilation albums, see pic. But both are long gone unfortunately. They're gorgeous, and contain some of my favorite songs from the fandom.

SGaP had his album The Standard Model released on vinyl and that is a must-buy too, if you can find someone selling their copy.

(Though if you're specifically referring to what 4Everfree has available to buy right now, my favorite albums are Lost & Found, Copycat and Copycat 2, Dreamer's Door and Pink Side of the Moon)

A decent number of musicians who have printed CDs of their works stopped recently for various reasons, but I wish you luck in finding some good tunes that are still available!