They will grade your cards based on their condition and rarity, and give you a market value for each card
In any case, I don't think that ShadowspearShadowspear was ever in the running when compared to these other two
If the permanent that was turned face up is no longer on the battlefield when Sumala Sentry's triggered ability resolves, you'll still put a +1/+1 counter on Sumala Sentry
Understanding Pokmon Card Types Before you start buying, it helps to understand what youre looking at
Even if we add another couple of bucks for the commons, uncommons, and foil slot, a pack of Modern Masters 2017 isnt worth considerably more than a pack of Modern Masters 2015
Let me know what you think of my recommendations and if you have any of your own