It’s very difficult to come by free or affordable audio recordings of the great Doctor.
3 sermons at Christians Unite
9 sermons at Praize
16 sermons at Sermon Index
Rotating ‘Sermon of the Month’ posted free from the MLJ Recordings Trust
Paid collections can be found in the US at Sound Word and Martyn Lloyd-Jones Recording Trust USA or in the UK at Martyn Lloyd-Jones Recordings Trust. These are quite expensive options, yet the cost is allowing the Trust to continue it’s restoration and conversion of the large library of audio which is slowly becoming available. The MLJ-USA site offers MP3 sermons at $4.00 each.