The Washington State History Museum in Tacoma includes exhibits on Native Americans and their lives after first contact.
Land sales were just one of many shameful practices which robbed tribes of their lands, stripped them of rights, introduced disease, and attempted to destroy their cultures.
This exhibit explained how 40% of the 18,000 acre Puyallup reservation was sold in violation of an 1855 treaty. Lands were often auctioned without the consent or knowledge of parcel owners and advertised far from the event. Locally, few knew of it.