I just purchased 8 Lishen 280Ah 3.2v LiFePO4 cells through Alibaba.com. I wanted to start this thread to share my experience.
Purchased from: Shenzhen Basen Technology Co., Ltd - https://sibeile.en.alibaba.com/?spm=a2756.trade-list-buyer.0.0.19b876e9C1hF22
Cost each was $75.20 x 8 + 241.70...