I got a Teknetics Delta 4000 for $193-199 on Amazon. I’ll put the link. It’s really good. I found .22 bullet lead 6”+ deep with no problems. I just can’t keep my cell phone on while using it because it messes with the search coil.
Teknetics Delta 4000 Metal Detector https://www.amazon.com/dp/B001F7BEWK/ref=cm_sw_r_cp_api_i_NKW9DbWV5QC13
I reckon you might want to look at the Teknetics Delta 4000. The price is a little bit above the 250 and the bounty hunter BUT it is a good bridge between some of the beginner models and the advanced models. ALthough it is not water proof like a garret AT you have access to quite a few after market coils if you feel like changing them up in the future.
The unit itself is light which helps if you plan to go on long hunts. You can use the preset features to start out with and as you get more proficient with it you can move into all metal mode or customise some of the features if you are after particular things.
Also the pinpoint feature on this model is very good compared to others within the same price range and can serve as a great intermediary until you buy a pinpointer yourself.