This is more than likely nothing, but still quite odd in light of the recent Wayfair/Amazon controversies.
Why are they consistently either $300~ or $10k+? Is there really that much of a market for these things?
https://www.etsy.com/search?q=blythe&explicit=1&order=price_desc
etsy.com/search?q=silicone+baby&explicit=1&order=price_desc&_qc=silicone+baby
etsy.com/search?q=reborn&explicit=1&order=price_desc