Merging iTunes libraries onto a new computer?

Hi,
I just purchased a new macbook and I want to sell my older macs. I have two, each with its own iTunes libraries (and associated files). These libraries are highly redundant, but not identical.
Is there an easy way to merge them and move them onto the new computer without being plagued by duplicates?
Thanks in advance

Unfortunately, no, it is hard to somehow automerge a couple libraries and avoid duplicates. iTunes is very stupid in that it is no able to determine duplicate files and so treats all files the same and adds them all. Which is good because you don't want iTunes determining three tracks are the same song because they have the same artist and song title and throwing two in the trash when in fact one was a studio version, another a live version and the other an alternate outtake version. You would make a lot of people angry doing that.
So, iTunes leaves determining if tracks are duplicates up to the user. You can use the command to show duplicates, but that is only to help you determine which songs MIGHT be duplicates and leaves it up to you to make that determination.
Therefore, when adding tracks, like from other libraries, iTunes does not make any attempt to determine, warn, let alone restrict duplicate tracks.
About the only thing I can think of to help is to go into the libraries of the computers you are getting rid of and manually deleting stuff you know are duplicates. For example, on your main library you see you have 8 albums by U2. Go delete those albums from the other libraries. Repeat as necessary to at least get them other libraries reduced considerably. Then it will be much easier to try and determine where they are different to grab the different things to put into the main computer's library.
Good luck,
Patrick

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