Anaconda usually offer the lowest (or close to it) prices for metal detectors. With 20% off they are now easily the best prices available.
Additional $10 off for new customers too. Original Coupon Deal
hmm seems you need a permit to use these?
Fossiking permit. Around $25 for 12 months.
Not on your own property
Depends on your state. Generally though, you only need a permit if you are searching for gold or gems. Looking for coins or other junk doesn't require a permit.