It might be different if you have unlimited amounts of free time on your hands and enjoy sorting Magic cards, but for most people, paying 10% plus $0.03 per card is a great deal because it allows you to avoid hours of work sorting your cards, typing them into buylists (potentially multiple buylists to maximize your profits), and dealing with the hassle (and cost) of shipping a bunch of different packages around the country
Jarad, Golgari Lich Lord gains strength for every creature in your graveyard which is often when youre playing 37 creatures
Hitting the threshold needed to win with these is very easy, and you'll likely find yourself winning with these permanents over combat if you can't break through defenses
Couple that with rumors of a short print, and you have a bit of artificial scarcity on hand, which in turn could lead to this being one of best Pokmon packs to buy for rare cards
I might be missing some situations though
Because of that tension, its not a Top 10 card, but for your decks, its a strong adjunct to similar cards, such as Mortivore