To what extent and which components can be salvaged from 5-15 years old electronic devices? In other words, what is feasible to dismantle for hobbyist use and what is not? Especially, is it ok to reuse surface-mounted ICs?

My own experience tells, that resistors, transistors, small capacitors survive quite well, but I am not sure about small diodes, small and surface-mounted electrolytic capacitors, crystals. Also, I have bad experience with recycling connectors (pins get out of plastic case).

Somewhat related, how to check non-trivial components? Do some of them loose precision a lot?

Maybe, there is some specialized web resource on the topic and or guides.

**UPDATE**: I am really interested in an answer from persons, who had more or less extensive practical experience with recycling different kinds of components. Personally I do not recall anything failed because of thermal impact of desoldering (but I have no experience with SMDs). And this makes this question even more interesting, because answers so far are discouraging the practice.