I keep them for couple of days only, in case something interesting happens in the market, and i need to review it.
https://www.engadget.com/2020/02/27/35-raspberry-pi-4-double-ram-2-GB/ Raspberry Pi enthusiasts can get their hands on the 2GB device for $35 (around £35, depending on where you buy it) -- which is the same price as the very first version from eight years ago.
https://www.omgubuntu.co.uk/2020/05/raspberry-pi-4-8gb-ram I wonder whether having an 8 GB Pi would be sufficient to install and run IB's TWS. Previously others said that the existing Pi's didn't have enough RAM.