How are we still talking about the RS3M 2020 in late 2026? It was really good for its time and especially its price, but we have better options now.
At a similar price point, the dual adjust RS3M v5 is still a popular multiblind cube for those willing to shell out more than for Meilongs.
For only a little bit more, there are three great, modern options with ballcores: the Dayan Guhong Pro+, the Moretry Tianma Zcube edition, and the SAOCube RS3M v5 matte with ballcore. The Guhong Pro+ is the easiest to find in most cube stores, and it has a big range of adjustment options, including for core magnet strength. I main the Zcube Moretry Tianma, and it's very fast for a spring cube. The SAOCube RS3M v5 is bordering on too slow for me, but it's still great for people who think modern cubes are too fast.
There's also the Qiyi M Pro v2 Pioneer UV in that price range, but I haven't tried it and it received mixed reviews.