Canon Eos C100 Cinema Eos Camera On Ebay
Price: $1,200.00
https://www.ebay.com/itm/Canon-Eos-C100-Cinema-Eos-Camera/124511381323?

Canon EF 17-40mm f/4L USM lens w/ Case and Lens Hood On Ebay
Price: $380.00
https://www.ebay.com/itm/Canon-EF-17-40mm-f-4L-USM-lens-w-Case-and-Lens-Hood/303829432364?

Canon EOS C200 Cinema Camera - Black On Ebay
Price: $4,499.00
https://www.ebay.com/itm/Canon-EOS-C200-Cinema-Camera-Black/303742720306?

 

Canon EOS C100 Mark II Cinema Camera Body Dual Pixel AF On Ebay
Price: $2,080.00
https://www.ebay.com/itm/Canon-EOS-C100-Mark-II-Cinema-Camera-Body-Dual-Pixel-AF/203184808939?

Using EF lenses on RF mount + drop in ND adaptor (so not looking at the awesome and expensive RF 24-70). Replacing ageing Tamron 24-70 VC for something with smoother AF - the focussing can be jumpy and jarring. Looking for decent in-lens stabilisation.
Was originally thinking the Tamron G2 but the stabilisation looks sticky for panning. Thoughts / experiences? Anyone using the Sigma 24-70 Art on Canon and can comment on the stabilisation -is it sticky, is it jerky? Mixed reports on internet, some say it’s not effective at all, some say it’s better than the Tamron. Limited footage out there - what I’ve seen looks ok...
Will probably rent both the Sigma and Tamron to test, but would be grateful for long term opinions going into this upgrade. Will likely be my workhorse lens for years to come. Cheers. 
Paul