What sort of trade bait do the Rangers really have?

In the run-up to this year's July 31 non-waivers trade deadline, we've heard talk about the Rangers' inability to add salary, the availability of pitchers like Roy Halladay and Cliff Lee, and presumed Rangers trade targets Hank Blalock, Derek Holland, Justin Smoak and Neftali Feliz. Since trades, especially those made by Jon Daniels (who doesn't allow many of his discussions to make their way into public consciousness), often involve players who haven't been in the news, let's take a more comprehensive look at the young, unestablished (in other words, not Elvis Andrus) players who would attract interest from other clubs and what type of interest they would generate. Could be a key piece in a deal for an elite player: Justin Smoak, Derek Holland, Martin Perez, Neftali Feliz Smoak is still scuffling in AAA, but he's as untouchable as any Rangers prospect in nearly a decade, as evidenced by being ranked in the top five in Baseball America's midseason u...