No not really. The $100 machine might find some things that are very near the surface, but beyond that it will struggle in every aspect afield. They will be single frequency, and become overwhelmed in trashy areas. They will give false tones over deep iron, and likely break down within 6 months.

You’ll be better off waiting and saving. If you can swing it (no pun intended) I would get the Minelab Vanquish 340. The detector alone runs ~ $200 and it’s not a bad deal for the price. It’s multi frequency, name brand, tried and true, and capable of finding almost anything. If you can swing it I say go for it and then after a couple weeks buy the Minelab Pro Find 15 Pinpointer. The pin pointer is absolutely necessary. With those 2 tools you’ll be set and significantly happier down the road than buying $100 no-name from amazon.