This $1.4M collection shown cannot be used to launder a significant amount of money. The only way something can be used to launder money is if you can turn around and sell it after buying it with the dirty money.
I assume that criminals are willing to lose XX percentage during a laundering transaction. This is the same as fencing stolen items, the criminal is willing to sell it for less than it is worth in order to turn something illegally gained into cash. Given the value of the collection shown in this listing less than a hundred dollars; there is no way that anyone would use $1.4M in illegally gained money and try to then resell it for a hundred (or even a few thousand) dollars.
Money laundering occurs largely in transactions without paper trails. Yes, money can be laundered in transactions which do have paper (like real estate) but those tend to be very complex deals with multi-layered shell companies involved. Money laundering is not only about 'cleaning' the ill-gotten money of a single transaction; it is also about dodging taxes and staying far, far below the radar of all law enforcement.
Occam razor; this is just like the thousands of other
ebay listings where the seller is being totally unrealistic (to put it kindly).
Don
Edit:
ebay IS being used to launder money but it is being used to fence stolen items or items "stolen-to-order". For example, the stories we are seeing where criminals are going into stores and walking out with carts full of merch here in the US are being fenced on
ebay.
But no one is trying to fence a $1.4M stamp collection, I think every here agrees that what has been shown in the listing is worth nothing even close to four figures (never mind seven figures).