Every time I see a post like this, I'm reminded that I have been down this road myself, and seen my family members suffer for it.
If this is tempting, be honest with yourself, and look at your track record. I'll bet that you have alot of parts lying around for projects that are still "in progress". You have a reason that they are still "in progress", but realistically, you are never going to complete it. They are all waiting on something, and that thing they are waiting on is not actually in progress.
Now you want to take in enough derelict electronics to fill a shipping container, because having 53, low power, invisible, assorted brands and designs of IR lasers, still buried inside their cases, is somehow better than not having them.
Do yourself a favor and tell your "friend" to hire an electronics disposal company. He should be paying you to take all that crap off his hands.
When the day comes that a flyback transformer or DVD laser is the last part needed to complete your Tesla coil or whatever, $5 in gas money and Craigslist will get you your part.