Salvaging components from a surface mount board can be much different than
"rework" of such a board (where you want it to continue to work.)  For
instance, I usually use a blowtorch or oven to heat the backside of a board
(aimed at extracting significant through-hole components) - once the board
is hot and smoking and you've pulled out your throughhole components, a
quick whack on the ground (you didn't take a blowtorch to your board inside,
did you?!) will result in a sprinkling of surface mount components.  An oven
is a more controlled heatsouce, and works fine too, but unless you can
dedicate an oven to electronics work (not too hard if boards are toaster oven
sized), I'd start to worry about lead contamination from solder...

People who do "real rework" have solding irons with a wide assortment of
special tips to span the width of different sized SM components, plus
hot air guns with a similar set of nozzles, plus IR, plus some special
purpose gear (go to an electronics show like WESCON, and you'll see some
neat gadgets involving very-low-temperature solders designed to melt and
lower the temperature of any existing "normal" solder as well, for instance.)
Such equipment runs $$$$$$, though...

BillW

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