A few outliers but the average has to be quite low.
DA Origins Ultimate is impossible to get under $30au here now, even importing from the UK. Silent Hill Downpour is basically the same, SH HD Collection is worth at least $50au but can go higher.
Those are some high examples of last gen.
Then you have 1st gen:
Panzer Elite Action $60+
Psychonauts $40+
Ninja Gaiden Black $50 or around that
All used prices but complete.
There are still plenty of cheap titles though, and I do still grab anything I come across at work.
People on Discord are saying EP is shut down...
WHERE THE HELL AM I TYPIIIING!!!! :P
They wouldn't even realize that this many people would be interested in such old games if not for emulation and rom sites.
I'd love to be a fly on the wall in the mod lounge and see what's going on :lol