Sold for...?

Can anyone from here tell how to figure out sold for price on particular item? It's very very useful, but for some reason the numbers are hidin.

Is that on purpose or they can be revealed somehow somewhere sometime?

https://www.audiogon.com/listings/lis8j15e-vpi-turntable-stand-w-bright-star-audio-sandboxes-oak-shelves-cabinets-racks-stands