I think Sofirn is maybe a couple years old. I don’t really know. I’ve never bought any of their lights.
I do know a lot about group buys. They can get you a very good price, but the tradeoff is it’s a brand new light which may have issues, there could be unforeseen delays in production or shipping, manufacturer support and information during the group by could be severely lacking and they can be all around quite frustrating.
It does depend a lot on the particular light in the group buy and who is running the group by. Typically they will start well before the light is first available for sale so you rarely get any reviews. So if you think you can handle all these potential problems, then you might try out a group buy. If any of these things sounds off-putting you might be better off just waiting for it to be available for retail sale and maybe get a coupon code to bring the price a little bit closer to the group buy price. Group Buys are not for everyone.