The i3 starts at $44,450 new, which is almost exactly the same as the Tesla Model 3 LR. I guess it's nice for consumers that there are used i3s out there (probably will be true of Tesla in a few years) but from a business perspective, selling the i3 just seems like a crazy proposition.
Here the cheapest new standard range Model 3 is 50,000 euros and long range 62,000 euros. Cheapest new i3 is around 42,000 euros, though they don't mention REX anymore. No used model 3:s are available on the free market so can't compare those.