Up for sale is a near perfect condition (literally used 3 times) Thule MOAB 690 XT Cargo Basket with the Extension (691XT). Like many Jeep owners, I am pretty darn OCD with my stuff, and it is in excellent condition, no parts or pieces missing, I have the manuals that came with both the main basket plus the extension, all the mounting hardware. Nothing is missing, damaged, etc.
The basket goes for about $350 new, and the extension goes for $115 new. You really do need the extension, it is sort of small without it.
My price for everything is $325 firm. Thanks for looking!