Just a brief mention of the Geekcreit 3.5″ TFT LCD Touch Screen+Protective Case+ Touch Pen Kit http://bit.ly/2qydycW for the Raspberry Pi – Banggood sent this to me a while ago – if you are planning to use an RPI3 and need a small screen this is a good an option as any and saves messing round with bezels etc.
LCD TFT resolution is 320*480 and an SPI driver is provided (works with Raspberry Pi directly). The case is a 6-piece PMMA enclosure that snaps together around the Raspberry Pi 3 Model 3. The whole thing is inexpensive.
I ordered this without thinking that my two main RPIs are actually model 4 but if you want to extend the usefulness of the earlier model 3 then this might be helpful.