Just check coupons out (with price alert and history). Do you want to know what the best price is?
ESC: 20A * 4 BLHeli_S (Dshot/Multishot/OneShot) support 2~4S LiPo, OSD: BetaFlight OSD w/ AT7456E chip, Bottom plate: 2mm, Receiver: Without Receiver/Frsky R-XSR / Frsky XM+, Motor to motor: 1507 3200KV, Motor to motor: 153mm, Gyro: MPU6000, Model: GEP-Dolphin 4”, Firmware target: MATEKF411, Reinforce plate: 2mm, Carbon: Full 3K carbon fiber, Weight: 136g without battery, Flight Controller: GEP-20A-F4 AIO, Camera: Caddx Turbo Eos2, MCU: STM32F411, PIT/25/100/200mW), Propeller: HQ4*4.3*3 V1S (4 pairs), VTX: 5.8GHz (40 Channel IRC Tramp, Frame: GEPRC GEP-DX4, Antenna: RG178 5.8g RHCP, Arms plate: 4mm, Motor to motor: 153mm, Flight Controller: GEP-20A-F4 AIO
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
GEPRC GEP-DX4 Dolphin Frame kit 153mm wheelbase FPV Toothpick RC Racing Drone Frame | $31.92 | – |
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($205.15): BANGGOODSD
2. ($207.35): Drones6
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): bGpAnDacHeCk, AFfbG10, BGGEPDolphin, BGDOL153, BGVDay10%off, BGDOL2, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, BGDolphinP, bgshOOp10, BGRC902, BgoFErTaSchInA10, BGHALLOWEEN, BgcLuBofErtA10, BGDolphinAA, BGDolphinBF, 7bcdf9, BG10RACING, BGCuponation10, BGMATT7, BGDAVIS
(probably won’t work, but you can try them out)
Price history and price alert
Price history (for all/most countries) for GEPRC Dolphin 153mm 4S Drone PNP is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).