The Chuwi CoreBox Pro offers an Intel Ice Lake processor, 12 GB of RAM, an NVMe drive and loads of ports. One of these is a Thunderbolt 3 port, opening the two-litre machine up to being used with an eGPU. The Chuwi CoreBox Pro is available to order now for US$439.
https://www.notebookcheck.net/Chuwi-CoreBox-Pro-Ice-Lake-mini-PC-with-a-Thunderbolt-3-port-launched-for-US-439.502347.0.html