75 percent of my packs has a decent card.
I purchased one 2017 Pokemon Trading Card Game Tapu Koko GX Island Guardians Tin for about $20. Its contents are as follows:
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1x Tapu Koko GX Promo card.
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4x Pokemon TCG booster packs.
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1x Online code card.

I normally don't purchase tins because the pull rates are awful... but I made an exception with this tin because Tapu Koko is one of my top 5 favorite Pokemon of all-time.
Please note I'll only be covering my Reverse Holo or better cards in this break.
Promo Card
- 2017 Sun & Moon Promo SM33 Tapu Koko GX

Aero Trail is a wicked Ability that allows Tapu Koko to hit hard very quickly.
2016 XY Evolutions Booster Pack
- Uncommon Reverse Holo 79 Maintenance

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Rare Holo 34 Gyarados

I was just looking at my original Holo Gyarados from 1999.
2016 XY Steam Siege Booster Pack
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Rare Reverse Holo 45 Nidoking

I pity the fool who gets close to Nidorino.
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Rare 57 Armaldo

2017 Sun & Moon Guardians Rising Booster Pack 1
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Uncommon Reverse Holo 130 Rescue Stretcher

Rescue Stretcher. Screwing up the metagame since 2017.
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Rare 79 Honchkrow

I wished that I had pulled the Holo version of this card...
2017 Sun & Moon Guardians Rising Booster Pack 2
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Common Reverse Holo 94 Goomy

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Rare Holo 13 Chandelure

Chandelure is a cool looking Pokemon, which is ironic considering it's a Fire-type Pokemon.
Pulling one Reverse Holo Rare card, and two Rare Holo cards from a tin is considered "lucky."