I bought some E3D V6 clone hotends.

I bought some E3D V6 clone hotends. How can I determine what the thermistor value is for these hotends?

I would ask the seller to be honest. Sometimes it’s hard to tell.

Found the description finally, 100K

You still need the K-factor for the thermistor for it to read right.

I think I will just change them out for some known value thermistors I have.

Yeah thermistors can vary a lot. I even had a silicone bed heater with two supposedly identical sensors with very different Rzero numbers. I too find it easier to replace the sensor for a known quantity.