The only bundle I can think of is the Mac Box Set (with OS X, iLife, and iWork), but for some reason I think that came out with iWork 09 and was never used with 08.
All boxed iWork versions I've purchased have come with the serial number on a sticker (the same serial number is e-mailed when you buy it online).
To see if it's bundleware, read your license. If it reads anything about not transferring the software without other bundle components, you know it was sold illegally. I remember those clauses being in some EULAs when purchasing hardware with accompanying software (especially true of CD-ROM drives in the 1990s).
All boxed iWork versions I've purchased have come with the serial number on a sticker (the same serial number is e-mailed when you buy it online).
To see if it's bundleware, read your license. If it reads anything about not transferring the software without other bundle components, you know it was sold illegally. I remember those clauses being in some EULAs when purchasing hardware with accompanying software (especially true of CD-ROM drives in the 1990s).