2.6-dev Item buying and selling very slow

[FalcoGer]

When I buy or sell items Items like weapons or magazines the game freezes for a long time (1-3 seconds). When selling or buying large amounts of items (such as magazines) this is very annoying.
Other items seem to work just fine, such as aircraft items. This also only occurs after playing for a while. When loading a save after a game restart this works in an acceptable amount of time.

I'm running a release build, built with gcc 9.3.0 on ubuntu mate, arm64. Commit ID a81222bd97dbd8bb692e2e50fa39503373fc4b23 from sourceforge

Buying/Selling items in bulk would be nice.