STA Travel, the travel agent aimed at students and backpackers, have appointed UBS, the investment bank, to explore a number of strategic options, including a sale. The company, which could sell for up to £66m, has attracted the interest of several holiday companies including First Choice, Lastminute.com and Ebookers as well as private equity firms. STA is currently owned by Diethelm Keller Group, a Swiss marketing and travel-services organisation.