Baile 48 bass compact piano accordion (sold). Made in China this instrument has 2 voices and 30 treble keys, which means you can get down to the lower G, which is very satisfying (especially if you are used to playing on a two octave instrument). This would be ideal for a learner as it only weighs 6kg, which for a piano accordion is quite light.
[youtube=https://youtu.be/OBz2Z5T81TU&w=320&h=240]