You’ve probably never heard of a manufacturer called Gteng. They’ve introduced a drone named Gteng T901F which is probably the cheapest drone capable of FPV functioning at 5,8 GHz.
Not only the price is worth mentioning, the equipment is too. The video is transmitted to a display which is integrated in a nicely elaborated transmitter powered by a 500mAh battery, just as the drone. The stated durability is 8 minutes’ maximum. The drone has a 2 MPx camera and is capable of the headless mode and the RTH function, but there’s no GPS in it, so it might get lost sometimes.
Gteng T901F is available for 79,99$.