I had last two OC for 50 at friends independent shop. Vectra, 5 litre of Valvoline Synpower MST 5w40 35+ filter 5+ work 12 Euro. We are talking C3, MB229.51, LL-04 oil, not some iffy lube SN.
Punto, 4 litre of A3/B3, MB229.5, LL-01 was 20, filter 5, work 12= 37 Euro.
I understand that up north work hours are WAY more expensive, but still if main stealers are avoided it can be done for reasoning price. My German family pay around 80 for OC in local garage up there IIRC.