Unless there was some change to this model via a supplement instruction sheet, some of the parts in the inventory don't even belong there: Panel 1x2x3 Slope inv. 75 2x1x3 [...] (59 months ago, Jul 1, 2019, to Inventories)
I bought a new and slightly incomplete sealed set. Boxes 2-4 fully sealed plus some sealed bags from box 1. Ebay auction #113697990842 (use advanced search to see sold listings) [...] (61 months ago, Apr 27, 2019, to Inventories Requests)