Yes, I heard Farley vol. 2 is hard to find at the moment. Have a look at a Parts List and a Technical Manual, both are available as reprints.
I didn't say BEST but MOST COMPLETE you can afford, most of the sheet metal is relatively easy to replace if needed but original jeep parts can be pricey, and sometimes (very) hard to find. Of course it all depends on make and the date of delivery. That being said, jeeps are offered for sale regularly so you can walk away from any you don't really fancy.
Btw I saw I made a typo, it's g503.com, not 530.com lol