I got a giant bag of uncooked boba on Amazon a year or two ago, and I still have a ton left because I don’t drink it that often and only boil 1/3-1/2 of a cup at a time. It was like 20 bucks for a 6-lb bag: https://www.amazon.com/Boba-Tapioca-Pearls-Tea-Grade/dp/B019E9FUDE?pd_rd_w=QF41n&content-id=amzn1.sym.55bebd03-1feb-4883-a1f4-21b3be773289&pf_rd_p=55bebd03-1feb-4883-a1f4-21b3be773289&pf_rd_r=7XHJRE1Q5GPJECXW5F61&pd_rd_wg=HGpbk&pd_rd_r=5ba07d7f-c6b3-47ee-94d1-22d6569eb7fe&pd_rd_i=B019E9FUDE&psc=1&ref_=pd_bap_m_grid_rp_0_1_t