R0CKY all the big manufactures have good machines in your price range especially if you are not going to submerge the control unit in water while detecting. What kind of sounds do you like, I recommend you look around online and watch some videos of many makes. You will notice that Garrett's have a bell tone, Minelab's make a Bwoop Bwoop sound, Tesoros have a monotone and the rest have what I call standard tones. I normally run discrimination in most yards, parks, and schools but in the fields I do not run any. In your price range, here are a few to look at. I like DD coils much more than concentric coils, they seem to give a more stable Target ID in my experience, yet others love concentric coils.
Standard Tones Detectors
Teknetics Eurotek Pro
Teknetics Delta
Used Teknetics T2
Fisher F2 w/DD coil
Fisher F44 w/DD coil
Used Fisher F75 with DST upgrade
Whites TREASUREpro
Used Whites MX Sport (waterproof)
Used Whites MX All-Pro
Used Nokta FORS Relic
Bell Tones
Ace 300
Ace 400
Used AT Pro (waterproof)
BWOOP BWOOP sound
used Minelab 705
Mono Tone
Tesoro Mohave
Tesoro Vaquero
I use the Kellyco site to review machines specs. I believe you can review 4 (max) side by side. Please watch videos on the ones I listed above and others that pique your interest. I like to see target ID numbers, not ranges only like the Ace*50 series. If you want to go by tone only and do not need a screen, then get a Tesoro (lifetime warranty). Minelab has a huge following, but they do not lose much value and most would be out of your price range. I also foresee their resale value will decrease after the release of the new Equinox.
My main detector is the Fisher F75LTD. I love the way it feels, the ease of use, it's not too heavy and I have many choices for tones.
The more you spend, the more bells and whistles you get. I highly recommend you get a detector that can be ground balanced.
Good Luck with whichever you choose.