Not bad at all for the money.
DSLRs are shifting from the market for mirror-less cameras.
So bulk,lens speed/quality and age is the only thing counting against in this package. Hence the value.
300mm is just about the start of wildlife focal length but realistically lens costs and quality will be the big spend later.
Plenty of modest price EF/EF-S lenses though given RF is the new dog on the street.
You probably won’t go far wrong.
I just dabbled with a Sony A7C (b-cam for work) and payed nearly 3 used times that so it looks good value to me.
It might be worth seeking out the ‘best’ cheapest body you can find without lens and sourcing a lens you really want?
Cheap lenses tend to stay on the shelf.