We understand sustainability as a perspective on the performance of various kinds of systems that puts human well-being in the center of focus. Recognizing that information and communication technology (ICT) is shaping our modern society, there is a need to understand the impact of ICT on sustainability. On the one hand this can be achieved, for example, by extending classic software development approaches to cover sustainability issues. This can be coined sustainability in ICT. On the other hand, innovative ICT approaches offer the potential of directly addressing sustainability issues (sustainability by ICT). Within the ICT4S community, both perspectives are addressed. What is missing, is an overarching perspective that helps to identify interlinkages. In this contribution, we present the case of an online-shop selling ICT hardware products as an community exemplar. We exemplify the usefulness as an overarching example, by relating parts of our existing work on ICT sustainability to it: a process model of the sales process, as well as a representation of sustainability risks related to the sold ICT products. Additionally, we show how ICT4S papers from 2016 can be mapped to the exemplar. ... mehr We conclude with presenting a community website, where we invite fellow researchers and practitioners to contribute to a growing wealth of sustainability insights.