g., more professional vs. more casual) or to a specific piano brand? Yamaha U3 | Sherine S Piano Grou - 钢琴团购
Best for community forums (e.g., Reddit, Nextdoor) or WhatsApp/WeChat groups. piano group buy
[Link to official group buy page or signup form] or Facebook groups.
Best for producer forums like Gearspace, KVR, or Facebook groups. piano group buy