The amount of the transaction was not disclosed.
Iris Capital joins a group of German private and venture capital investors including Hasso Plattner Ventures, DuMont Venture, Mountain Cleantech and Klaus Wecken.
The investment will allow the company to grow its business.
Created in 2004 as trade-a-game and led by Lawrence Leuschner, co-Chief Executive Officer, reBuy provides a platform for the trading of pre-owned goods and devices in multiple categories including mobile devices, Apple products, tablets and video consoles, books, video games, DVDs and CDs. reBuy sources the products from individuals who can sell their products for a fixed price to rebuy and from business partners (overstock, store samples, returned goods, trade-in devices etc.).