Wall-Buys are locations in a Zombies map in where you can get a better weapon to fight against undead waves. For a small price, you can purchase one of several weapons or armor to give yourself the best tool possible that suits your playstyle.
However, on the new Tomb map, it can be hard to figure out which Wall-Buys are available. The Tomb is the newest Zombies map as of this time writing coming in 's Season 2 content.
This area has dark crypts, an excavation site, and a mysterious realm that exists outside of space and time. When you begin a match on The Tomb, you start in an area called the Dig Site that has some of the Wall-Buys you can find.
In total, there are eightdifferent Wall-Buy stations in The Tomb, with each containing a unique type of weapon for you to purchase.
Killing enemies will help you gain the funds you need to buy more expensive Wall-Buy weapons or armor, so take time during waves to grind some cash.