Let me guess... you want that wallet.dat file sent to you? What guarantee or assurance can you give to the OP that you will send him the coins, less your fees, after you successfully recover the password?
I suggest you escrow 13.8 BTC which will be refunded to you less the agreed fee if you successfully access the wallet. Obviously the dilemma here is what would happen if you claim you failed to crack the password (when in fact you did) and ask for a refund of the escrowed coins. So escrowing these coins might not be a safe solution after all.
OP should carefully seek advise from seasoned members here and use a vetted method without sharing the actual wallet.dat file with anyone here.
Wait for that flood of PMs. Be on your guard when responding. Do not send the wallet.dat file.