Damaged cards will typically sell for much less than cards in mint condition
There are a lot of scary creatures out there that want to get in damage without being blocked, and while the Halfling discount is really good, don't discount that this card can end a game really fast if it gets onto something else for 4 mana
I dove in recently to explore the world of live breaks, graded cards, and last-second bidding wars
Violent Outburst Too good for Modern, mediocre in Commander, Violent Outburst is the kind of card you put into a cascade deck so you have a critical mass of cards with your core keyword
You almost never get to ultimate level, but it's there if you want
For example, Bottomless Pool // Locker Room has a mana value of 6 while it's in your library