On a budget doesn't give us much to go on.
This is probably one of the best times of the year to buy.
Canon's Refurbs are a great value. They are a good way to get lots of bang for your buck. Affordable and good for those on a budget.
I doubt you will see the 5D4 lower than it is now.
EOS-R too, you'll need a control ring mount for your current lenses.
Bay Area - CA
~R5C (188.8.131.52) ~Many Lenses ~DxO PhotoLab Elite ~Windows10 Pro ~EVGA RTX 3080Ti FTW3 Ultra
~ImageClass MF644Cdw ~Pixel6 ~6D2 (v1.1.1) retiring