Being 80 years old doesn't mean a person is frail, too sluggish, or a slow learner. Del is one of a few people I know who gets around and does well. Of course, he has experience and isn't starting fresh trying to learn what works, how it works, where to go and how to hunt. So in this case Andy, it would be good to know what type of detecting the 80 year old wants to do and that he or she can handle the rigors of some challenging terrain, etc., and know what they expect from a detector in the way of features and performance.
Example, I am very knowledgeable and experienced with detectors for almost any type of applications, but at 70 years old and dealing with mobility limitations from age injuries and health, I have spent this years adjusting my detector outfit and trim it to lighter-weight and easier, more comfortable detectors to handle. Knowing that the majority of hobbyists in this great sport get their start, and most seldom go beyond, typical urban Coin Hunting, I believe an 80 year old just getting started might be best served with a detector more fitting to Coin Hunting and not trying to tackle a very dense iron littered site that is often found in rougher or brushier terrain. I also feel it should not be a heavy detector or awkward to handle. It should have ample adjustment functions and common features found today, and also have an All Metal Pinpoint mode to better locate targets t be retrieved. However, I do not feel it should be overly cluttered with too many adjustments or be something a newcomer might find confusing or difficult to learn and master.
I don't know how healthy the 80 year old is, or what kind of budget they may want to spend to get involved in this sport, so my suggestions are to consider detectors that have an MSRP of $500 or less, and looking at those that are available that I feel would fit the above suggestions I made, I would suggest any of the following:
Fisher F-44
Nokta / Makro Racer 2 or Simplex +
Minelab Vanquish 540
Teknetics T2 Classic or Teknetics Patriot
In my personal detector group I have six different models that are terrific performers, but they are also discontinued models from Nokta / Makro, Tesoro and White's. The rest are new or currently manufactured models, but they have an MSRP greater than $500. Those include the two XP ORX units I bought this year. I have not used any model from Garrett or White's with an MSRP under $500 that is what I would consider to be a worthy investment and providing ample in-the-field performance for general urban Coin Hunting. The other models I own and use that have an MSRP under $500 include the Fisher F-44, Teknetics T2, and Nokta / Makro Racer 2 and Simplex +.
Of those listed I did have the opportunity to check out a Vanquish 540, but indoors only and I didn't purchase it to try afield. But based on that hands-on quick test using a few sample targets, it is one I would recommend checking out and added to the list. The others, except the Patriot, are all units I own and have here in my den and would recommend to anyone. They are there because they work, they are built well, and they will serve many needs just fine. And I can guarantee that ANYTHING I have now, each of them would have been a terrific detector to have had when I got started back in March of '65. And any of those I gave as under $500 suggestions would have been Top of the Industry models even through 2006 when the first Teknetics T2 was introduced. So the individual could select just from that group of six models have be off the a terrific start in getting out and having fun.
Monte