Default [Q] How much will an iPhone 4/4S logic board can cost?

Hello,

i was wondering, how much an iPhone 4/4S logic board comprehensive of CPU, RAM, ROM and mass memory can cost?

No need to consider the cost of the camera, display, cover, etc. Also if you can change or access/remove the mass memory (with mass memory i mean the storage, 8 GB or 16 GB or 32 GB and so on) in the logic board, no need to consider mass memory cost.

Also, i already found the original iPhone's logic board for sale; but are they comprehensive of CPU, RAM, ROM and so on? I can't really understand. Looking at the price i wouldn't say that.

Thanks in advance for your time.