Sure. MS had tons of resellers with somewhat different markups, although not that different.
We needed only the basic stuff: Windows Server, Exchange, MSSQL, a bunch of XP licenses. And this all was straightforward. We also got MSDN subscription basically for free.
You could literally get certifications in Microsoft licensing. There were experts whose only job was Microsoft Licensing consultants.
MS’es licensing was so bad you would get different quotes from the same person within a week of asking because almost no one understood it.