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I need MacBook pro main board for a1342 how much and how can it get to me

First there are two versions of the A1342, this guide is for the White poly case models, so make sure this is correct. Next there are two versions of the logic board the 2.26GHz and 2.4GHz. To confuse you even more only the 2.4 model offers 16GB of RAM support over 8.0GB limit of the other board. Here’s one source for the boards: White Unibody Logic Board, 2.26GHz - Supports upto 8GB of RAMWhite Unibody Logic Board, 2.4 GHz - Supports upto 16GB of RAM And here’s the guide to put it in MacBook Unibody Model A1342 Logic Board Replacement