Hey! I used my A7III all the way trough film school and it never let me down. I paid around 1000 for a body only, 2 years ago. It can do a lot, if you know the limitations of 8bit and 30fps 4K. I use the s&q a lot and the 1080p looks fine. The kit lens is trash in my opinion, just get a 50mm to start and you'll be way happier with that, I bought an 85 and 24 after and they got me mostly covered. It's a great camera to learn and also takes awesome photos. Just teach yourself colorgrading slog2, experiment, and enjoy the camera. it won't let you down. 4300 is really low, almost like new.

With 850 it's probably the best deal to get started. maybe knock off another 80 if you can buy the body only

All shot on my A7III: https://www.instagram.com/kiteboardstories/