Sakura

Sakura, despite having quite a high MU count of ~190, is actually quite a difficult rim to spot in trading. With only ~8K copies being made, as well as it being quite an old item, it really isn't all that easy to spot. It has lower amount of copies compared to other very rare items, such as Euro Cloverleaf, Retrowave Rims or Diamond Engrave (~10.4K copies, ~9.5K copies and ~8.8K copies respectively). It's also a hoarded item which also impacts how hard it is to find quite significantly.