iPhone 3GS missing components

Jaywn, there is absolutely no reason to replace the board. L85_RF is the "blue inductor" 1.2NH-1.36A-0.045OHM and as you probably already know, some people do bridge it by using a circuitwriter pen or similar tool. L3_RF is another inductor, values7.5NH-1.4A-0.080OHM. I would replace both of these components. They are readily available, but a bit hard to solder to the board due to their size. You'll need good tools and excellent skills. Both of the inductors are part of the cellular antenna circuit, your phone will not have any service without them. Total cost for both pieces should be less than $5.00, hope this helps,