Boy, never thought you'd get so much conflicting advice, did ya??
I'm going to recommend the Compadre. You can check my earlier posts and see why.
The uMax is great and offers interchangeable coils, but the Compadre runs at a higher frequency (12 kHz to the uMax's 10 kHz) which means it'll be more sensitive to gold jewelry.
The Compadre is also very simply to use, has the kind of depth where you'll find 90% of your targets (6" or less), and only requires an outlay of $150.00 brand new.
On top of that, it has a smaller 5" coil which is excellent for those trashy parks and schoolyards.
And lets not forget how much fun the Compadre is, which is what this hobby is all about anyway.
If your friend ever decides to upgrade, the Compadre will continue to serve as a backup/loaner detector.
Good luck on your choice.
