What projector contains what type of diode?

Greeting fellow members,

I can buy a XJ-M256 for a reasonable price.
What diodes are in these projectors and how many?

I always dreamed of harvesting a projector.
Is one of you willing to share his knowledge with me by telling me what type of projectors are interesting?

I know about the XJ-A140 & XJ-M140, but these are just two old types while this awesome manufacture sells many other newer types.

And should I only look for this manufacture (I understand that I should not use its name) or are there other competitors on the market that use laser technology with 2+watts diodes. And maybe other wavelengths?

What manufacture, or type beamer are using the:
-NDB7875 diodes?
-NDB7K75/NDB7A75 diodes?
-NUBM44 diodes?
-NDB7675 diodes?

I won't be selling or anything. it's just I will sometimes search 2nd hand online markets in the neighbourhood and hope there will be a cheap suitable projector. But I don't want to make the mistake of buying the wrong type.
If I know what diodes and how many there are in, I can see whether its a good deal or not.

Please share your wisdom with those who seek it (me) :thanks:
If you rather PM me, that's fine too.
Thanks in advance