Large body of recent work has been devoted to multi-agent systems utilized in e-commerce scenarios. In particular, autonomous software agents participating in auctions have attracted a lot of attention. Interestingly, most of these studies involve purely virtual scenarios. In an initial attempt to fill this gap we discuss a model agent-based e-commerce system modified to serve as an airline ticket auctioning system. Here, the implications of forcing agents to obey actual rules that govern ticket sales are discussed and illustrated by UML-formalized depictions of agents, their relations and functionalities.