Just last week, for example, I replaced a fan belt. It costed me 130QR for AC Delco part. Not sure with company part.
Another example:
- Transmission filter (QR197 - company)
- Topside gasket engine (QR178 - company)
- Front brake pads (QR240 - thirdparty, US)
- telescopic arm, support of rear door (QR150 - third party, US)

Now I hope you can judge whether it's expensive or not.

Jeep is Jeep. Someone won't understand :)