They are pretty scarce since they are so useful for mapping and the other option for mechanical shutters are slim at that price point. I hoped the M3E coming out would ease that situation, but I don't know if it will. I have one for my M210 that I am going to sell but I will probably sell it as part of the kit. I know that DJI was still fixing them when broken so if you come across a crashed one just send it in and you will probably save money. I sold a broken one on ebay in 5 minutes.
