E-GPUs are enclosures that lets you use a full-size dedicated graphics card with your laptop/low power computer. They do NOT include the GPU and you need to check your laptop has a 40GBps Thunderbolt 3 port.
This is one of the best + cheapest ones but has been difficult to source in Australia.
Price is $399 + 1% credit card fee, or 2% PayPal fee. Free shipping until the 18th.
It seems that device doesn't support for 1080Ti