One, do you plan to get the detector really wet as in submersed, or just hunt beaches with a coil in the shallow surf?
Two, do you want to purchase brand new to have a full warranty instead of a used unit?
In your budget range, and knowing that after you learn your first metal detector and get some file time under your belt, you might want to progress add a second or third model to complement the one you have. I will give you two suggestions for a current production model like I have in my own arsenal, that are affordable and very capable of being used for Coin Hunting, Jewelry Hunting, Beach Hunting, Relic Hunting and you name it. They are:
[size=x-small]►[/size] A Makro Racer 2 with an MSRP or $499 and get the smaller coil for trashier sites.
[size=x-small]►[/size] A White's MX-7 with an MSRP or $599.95, and also get a small 6" Concentric coil for trashier sites.
[size=x-small]►[/size] To keep in the affordable range, you might also look at the White's MX Sport with an MSRP of $799.95, and get the same 6" Concentric as the MX-7 uses, This will give you a waterproof detector if you plan on getting it dunked underwater.
Just some quick thoughts regarding models I know, own and use.
If, however, you are really stuck on either a Makro Multi-Kruzer or a Minelab Equinox, I will suggest the Multi-Kruzer. Far more accessories and search coils available for it, at affordable process, too.
Monte
