Unfortunately, the Giants actually have someone smart leading their front office. Zaidi like AA, spent a few years in the Dodgers system (as well as in the A's). I don't think he's going to simply take some of our non impact guys for his best trade assets.
This is where the value model is going to be challenged unfortunately. If you want your ideal fit, you're likely going to have to overpay - even if it's just a little - with so many current buyers. Just look at the other contenders...
Dodgers (60 wins) - looking for setup guy, preferably LH.
Yankees (57 wins) - likely targeting a SP.
Astros (55 wins) - don't really need anything, possibly a controllable SP.
Twins (55 wins) - a toss up between the rotation and back end help, no one with much closing experience.
Braves (53 wins) - obviously the back end, preferably LH.
Rays (50 wins) - rotation and pen, might be someone to make a play for Vazquez or Hand if they're made available.
Athletics (49 wins) - possibly a rental SP.
Indians (48 wins) - OF.
Red Sox - back end, preferably LH.
Rangers (47 wins) - SP.
Brewers (47 wins) - SP.
Cubs (46 wins) - back end, preferably LH.
Phillies (46 wins) - back end, preferably LH.
Gnats (45 wins) - back end, either side.
That's 8 teams likely looking for pen help, most of them looking for lefties. Whichever team that winds up with Smith will have overpaid or they won't get him.
I think most people completely understand if AA chooses not to do so, but there are going to be tons of disappointed fans if he could've stepped up and gotten him with a better lower-tier prospect and chooses to go get someone else that's not likely to have as big an impact because the charts said that's what he should do. If he's going to bargain shop, he might be better off holding onto everyone and using more SPs in the pen down the stretch.