We got our sheepskin from Satara which has a brick and mortar store here. It's mimosa tanned and it was about $100 - it was important to me to paywhat had to for the mimosa tanning to avoid chemicals and arsenic in the processing. I'm not sure how Ikea or the ones from ebay are processed, but since my babe lays on it every night, I was not willing to take any chances.
From
this link
"Toxic Heavy Metal: Arsenic
Extremely poisonous as well as colorless and odorless, arsenic can enter the body through the mouth, lungs and skin. Arsenic is the most common cause of acute heavy metal poisoning in adults. Arsenic is released into the environment by the smelting process of copper, zinc, and lead, as well as by the manufacturing of chemicals and glasses. Arsenic is found in water supplies worldwide with exposure of marine life. It affects the blood, kidneys, and central nervous, digestive, and skin systems.
Arsenic exposure: beer, chemical processing plants, cigarette smoke, coal combustion, drinking water, fungicides, meats and seafood, metal foundries, ore smelting plants, paints, pesticides, polluted air, rat poisoning, salt – table, seafood from coastal waters – oysters, shrimp, muscles, specialty glass products, water – drinking, weed killers, and wood preservatives. Workers in metal smelters, coal burning plants, manufacture of semiconductors, pesticides, opal glass, pharmaceuticals, paint,
leather tanning, and taxidermists.