Seriously, Dahua has some 8mp 1/1.8" cameras, but they are expensive compared to Hikvision ones WizMind Series
On the other hand, Hikvision does not have IR version of full color cameras like Dahua 5442.
I have 5x 2.8mm DS-2CD3T86FWDV2-I3 and 1x 6mm DS-2CD3T86FWDV2-I5S they are Chinese models which means they have Chinese web interface and won't work on International Hikvision NVRs, but you can use it on 3rd party ones or on a PC with BlueIris.
Cameras were not used in a location, but I have...
Raspberry Pi 1B: Raspberry Pi 1 Model B with Case | eBay
Raspberry Pi 3B: Raspberry Pi 3 Model B 1.2ghz Quad Core 64bit 1gb | eBay
Raspberry Pi 3B+: Raspberry Pi 3 Model B+Rpi 3 B Plus With 1Gb Bcm2837B0 1.4Ghz Arm Cortex-A5 E3U8 194452055845 | eBay
Orange Pi PC: Orange Pi PC H3 Quad-core 1GB...
Bought this doorbell, but never used. Open box, some items were unpacked to take photos. Excellent condition. Sending this from EU, so you won't have to wait ages to come from overseas.
Ebay link: YooSee SD-M5 doorbell with chime: 1080p, passive PoE wired or wireless, RTSP | eBay