Google aimed to make SketchUp available to everyone by offering a free version, while the $495 Pro version was aimed at professional modelers needing more exporter options.
: While the 3D Warehouse was launched during version 5, version 6 fully integrated the platform, making it seamless to download and share models globally. LayOut (Pro Version Only) sketchup version 6
Because Version 6 is abandonware (no longer supported or sold commercially), you can find it on: Google aimed to make SketchUp available to everyone
Looking back, SketchUp 6 was the "coming of age" release. It proved that a tool could be both accessible to a child building a treehouse and powerful enough for an architect submitting permit drawings. version 6 fully integrated the platform