Because this was an outside estate sale, there might be some slight dust on it from the item being outside and being an opened box. THE PARTS THAT YOU SEE ARE THE STANDARD PARTS THAT COME WITH THE TOILET. If a plumber wants or needs additional parts to install this, thats your responsibility. I GOOGLED THE VARIOUS PART #s on the exterior box and this is possibly from 2007 based on my google search.
I don't know, maybe they have had this model around for some time????? The item "TOTO SW824/01 COTTON CHLOE WASHLET Toilet Seat New in opened box" is in sale since Wednesday, May 17, 2017. This item is in the category "Home & Garden\Home Improvement\Plumbing & Fixtures\Bidets & Toilet Attachments". The seller is "those_were_good_old_days" and is located in Frederick, Maryland.This item can be shipped to United States.