There are caps set on the amount a team can spend in a trade. It was $3 million for a long time.See what these picks go for this year -- Philly at #23 and Miami at #27. Obviously the Jazz buying #27 from Denver for $3M is ancient history by now, but I think late 1sts will go for around $6M or $7M.
Also, the Jazz spent $3 million and traded a second-rounder attached to it in a really bad draft eight years ago.