I got a buyer for my stock rims and he wants to put them on a 07 cherokee? will this work?

 

The stock Grand Cherokee wheels are 17"s and the Sahara's are 18" so the Sahara wheels (rim+ tire) are probably taller.

The most important factor the bolt pattern is the same on both vehicles 5 on 5.

I am not sure about the backspacing on the GC wheels, but both wheels are 7.5" and offset is positive on both.

So they will mount, but they may rub.

Run a search, I believe this was discussed in the past couple of months.