I believe the larger coin is Magnentius. While I can't really see the details very well it appears to be a rather nice bust. It may even be his little 'bro' Decentius.
I do not collect the type but have a foggy memory of good ones fetching around 50 clams back 25 years ago!
But as with many once rarer issues I believe the armies of weekend detectorists (and this lot certainly looks like it comes from such) have vastly increased the supplies.
Still someone might spend more than a few euros for a nice Magnentius these days