This is a Martin 0X Soprano ukulele made by Martin in Mexico.  I bought it new sometime around 2017.  It was available in several colors, and this one has the green finish, as can be seen on the photos.

The 0X ukulele is made from a high-pressure laminate that is very hard and more resistant to damage and to temperature extremes than wood. In these ukuleles the laminate was given a bamboo-like finish appearance, though there is no actual bamboo used in the construction.

Though I’m only an amateur player and far from an expert I think it sounds quite nice.  You can read a comprehensive review of it here: https://www.gotaukulele.com/2017/05/martin-0x-uke-bamboo-soprano-ukulele.html

The only reason I am selling it is because the soprano size is a bit small for my fingers and (perhaps because I’m getting older) I find it a bit less comfortable to play than a larger size ukulele.

As you can see from the pictures it is in excellent shape and has only been lightly used.  It comes with the original soft case made by Martin.

Please note that although this is a normal right-handed ukulele (the guide dots on the side of the neck are visible to a right-handed player) it is currently strung for left-handed play. So if you’re right-handed you will need to reverse the order of the strings or just put a fresh set of strings on it in the usual right-handed order.

Note: yes, that is a photo-bombing cat. Please don’t bid on this item if you are severely allergic.