<p>➀ An engineering sample of Valve's Steam Deck handheld sold on eBay for $2,000, three times higher than the most expensive retail model.</p><p>➁ The prototype is a rare piece of history, with a clear 'Engineering sample 34, not for resale' badge.</p><p>➂ The prototype features 8GB of DDD4 memory, a 256GB SK hynix NVMe SSD, and an unspecified Picasso chip, indicating a Ryzen 3000 series mobile chip with Vega graphics.</p>