I think OSHPark is at $5 per square inch?for three boards. So 3 100x100mm boards would be $80, not including shipping. Those boards from JLCPCB would have been $5 for 5 of them.?
If you think the removal of the de-minimis exemption is sad, go have a look at your 401k.
Looks like even more reason to go "Manhattan" style with Chuck!