When the update The Hunt Begins hit Counter-Strike back in 2014, the game received the Bank Collection. Like many other early items, weapons from the this collection are rather cautious with their art style: lots of gray and generally dark colors, plus simplified images over the gun bodies.
Still, we can see here some pretty brave decisions, like 100-dollar bills that cover P250 | Franklin, or AK-47 | Emerald Pinstripe with tricky green and white lines. Small details make Desert Eagle | Meteorite quite an interesting skin too.
Despite being released a long time ago, the Bank Collection is not too expensive. You can get these CS2 skins for very little money.