Where to buy Samsung INR18650-25R?

First For $100 its free shipping.
Second they are a known Great US distributor (I can drive over if I want)
Third there is the whole “risk” thing. meaning if some or all the cells are “not to spec” what recourse do we have?

See on point topic here Manufacturer's accountability

I will PM you, oh BTW did you send a few cells off to HKJ?

If you want our business it might pay to extend a BLF flat landed price of $3.xx per cell shipped (if you need a min qty then work out the volume price breaks).

Can you get other cells?
do you have a “representitive / distributor” in the US?

I am glad you are trying the break in, and these cells are a great point to leverage!!!

Kevin