That feature is available as "block prices" in the Aimeos core.
You can add several prices to a product which only differs in the price value and the quantity, e.g.
- qty: 1, value: 2.50
- qty: 11, value 2.30
- qty: 21, value x.xx
You can see the feature already in the demo (click on the price):
Questions around the TYPO3 integration and plugins as well as Flow and NeosCMS
Forum rules: Always add your TYPO3/Flow, Aimeos and PHP version as well as your environment (Linux/Mac/Win)