Practical software reuse, in which existing software components are invasively modified for use in new projects, involves three main activities – selection, alteration and integration. Most of the academic research into practical research to date has focused on the second of these activities, alteration, especially the definition of reuse plans and verification of persistent changes, even though the selection activity is arguably the most important and effort-intensive of the three activities. There is therefore a great deal of scope for improving the level of support provided by software search engines and recommendation tools to practical re-users of software products. Search engines are particularly promising in this regard since they possess the intrinsic ability to “evaluate” products from the viewpoint of users’ reuse scheme. In this paper we discuss some of the main issues involved in prioritizing the selection support for practical reuse provided by test-driven search engines, describe some new metrics that can help address these issues, and present the outline of an approach for grade software products in search results.