This is an exciting time for amateur radio. We have had so many changes due to technology. Our radio signals can be bounced off the moon back to the other side of the Earth, carried to very specific destinations over the internet, re-transmitted by satellites, carried with digital signals or simply transmitted and received the way they have been since the beginning with analog signals and simple radios.
You see, George Boldt (a hotel magnate) bought Heart Island in the early 1900s I believe it was and hired all kinds of folks to build this castle for his wife as a summer home. Unfortunately, his wife died of consumption before the castle's completion and he had everything stopped. There it sat for a number of years deteriorating and being subject to vandalism and what have you. Now this castle is owned by the 1000 Islands icom two way radio earpiece (bought for a whopping one dollar from Boldt's daughter) and they have been restoring it, but never plan to complete it. They feel it should stand as Boldt left it.
The beep will be louder nearer the location. The drawback to icom radio-transmitter devices is their limited range of 100 feet to one mile depending on where you're searching. It stands to reason if the terrain is a wide-open area the signal will be louder and extend further.
If they are rechargeable, then make sure they have a full charge. If they are disposable, make sure you replace the Marine VHF unit with fresh batteries (as well as stocking your boat with a plethora of backups). Next, turn the marine radio on and test out that it is properly functioning to ensure that you can make a SOS call if need be. You cannot be too careful with the above mentioned steps. Many times in our excitement for all of the fun we are going to encounter we tend to overlook the necessary precautions. Please prepare a safety checklist and make sure every item on the list is taken care of before your first trip out of the season.
So where is the real money? The real money is in supply and demand. If you have something that is in demand it will sell. If you don't it won't. I know this is basic Icom Business, but it seems a lot of people have lost site of this for the quick, easy buck. Long lasting sales don't happen over night. Market saturation also plays a big role.