Fees and turnaround times eat into your wallet, so do the math first
I doubt that Ive convinced most of you that the Reserved List is worth keeping, and thats okay
Jarad, Golgari Lich Lord gains strength for every creature in your graveyard which is often when youre playing 37 creatures
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
Because of that tension, its not a Top 10 card, but for your decks, its a strong adjunct to similar cards, such as Mortivore
I might be missing some situations though