Last year, I bought what was listed as new, a Pioneer 505 off EBay. It turned out it was not new and had two cracks in the plastic. One crack was in the plastic around the plug connection for the coil in the back of the electronics housing. The other crack was in the twist-lock collar for the search coil stem. The seller offered to take it back and was very sorry. Here is why I kept it.
Everything else was in nice shape and by the time I were to ship it back, with my additional time, gas, (last year was just over $4 a gallon) to take it back to the Post Office, I was going to have more into this machine than I had wanted to spend. After I had removed it from the box, I immediately put in two fresh 9 Volts and put this machine to work in the yard. While I had been waiting for it in the mail, I had downloaded the manual and read up on it. Right away, I began finding coins. The crack in the plastic by the coil wire connection has not been any problem at all to me. I tightly wrapped the lock collar with an elastic black colored self adhesive rubber electrical insulation tape to keep the crack from spreading apart when the collar is twisted to tighten and is also has not been a problem to me when used in the field.
My experience goes back to about 1982, the first time I ever used a detector, and found a mans gold ring and a Wheat back penny (was a Garrett Master Hunter machine) in the mountains of Idaho within an hour. I had no previous experience, was cold turkey turn on the machine and learn it on the spot.
This Pioneer 505 was going over ground right out of the box I had worked over with a Garrett Freedom II Coin Master which has always been a very reliable coin machine for me. Because of this, I kept the Bounty Hunter 505. The Bounty Hunter may in some part seem a more cheaply made unit but it has survived so far, the very rocky and rugged terrain we have here down along the Salmon River. The standard search coil also took a hit last year from a Rattle Snake and survived
This machine exceeded my expectations so much, I bought a 4" gold nugget coil to go with it and do not regret that either.
My Pioneer 505 is always used with headphones in very trashed out locations. The typical camp locations along the river that every fire pit ends up used for disposing of aluminum cans and other metals. Outside of metal detecting shooting ranges with all the spent cartridges and bullets, there is never an end to all the melted aluminum that ends up scattered all over these camp sites, developed or not and even finding this junk in the river bottom. With the standard coil or the 4" in these trashed out and highly mineralized places, this 505 has noticeably found me more Nickles than my Garrett Freedom II. Being a Garrett man all these years, this was hard to take.
The settings I somehow naturally end up using on the 505 are just past power turned ON at Low sensitivity and Low discrimination while hunting in All metal combined with Ground Trac use and then discriminate in the Discriminate mode. Maybe one day I will play more with the Knobs but it works for me. I grew up on SOUND and not the Bells and Whistles telling me what I found so it's extremely rare I look at the Depth because most coins are often 4 or less inches deep and most times only look at the Target I.D. when getting a Tone for Nickles. Large steel or iron objects it will find deep but I've had them also show high or more valuable on the possible target I.D. and any of those target contraptions can be fooled by odd metal contents not normally encountered.
The Pioneer 505 is very easy to handle, never wears my arm out, and I believe the machine to be very easy to learn and operate while providing performance thought to only be found in Big Boy Toys. I have read many reviews that run the Bounty Hunter machines right into the ground but I'm convinced it is because these guys spent a fortune on their units to find a nice Bounty Hunter nipping at their heels. There are so many makes and models for all kinds of uses but much about metal detecting has more to do with the User than the price of the machine. Just an example of this is, I'm playing around trying to see if this 505 will discriminate by a method used long ago just by using All Metal/Pin Point mode and then applying Ground Trac to ground balance. It was a method that some called 12/21, a discriminating technique that today would be seen as taking to much time and effort. Yes, the 505 has Discriminate but I want to see if it will do it the old Timers way. Can not say for any certainty right now but it seems to work when mineralization is not so heavy.
Enjoy your 505. For the Dollar extra, your not out anything to keep it.