One+ is somewhat related to Oppo, in fact they share the same manufacturing line with them. Maayo unta ilang gamiton ang Oppo marketing arm para mo baligya diri sa Cebu.
For now, this phone is sold officially via invites but online stores are selling them with high mark up price because of the big demand. The cheapest option is to buy it from China through
AliExpress.com. at around 20K to 21K including shipping. If you decide to ship buy from these online stores I would advise to use EMS than DHL or FedEx. If you use DHL or FedEx, import tax may range from 2K to 3K but with EMS you will only pay less than 500 for duties and taxes.