Compare this date and grade on eBay for ones that have sold.
Here is a ms 64 for sale now...
1880 s Morgan Dollar PCGS MS64 | eBay
When you say he has a pile of them in the 70's

Something fishy here?? They only go up to 70!
At $125 you are paying full price...
Sorry for the confusion.
The coins were graded in the 1970's by PCGS
You see them on ebay in the old sealed plastic with an old looking PCGS label inside the sealed plastic.
I have been buying junk silver from him for about 5 years.
He calls the local coin shop (which is 200 miles away, yes we live in the great North American Outback)
They quote him a price and he knocks off a percentage for gas price/mileage and if I like his price, I will
buy what he is selling.
I have bought a few of his old graded coins as he won't sell me junk anymore.
I guess I just have to take the trip and see if I am getting a deal or not
Lately he is only wanting to sell his collectables for whatever reason.
This is what the case they are in looks like, I am not saying this is what the coins look like as
far as quality, just the style of sealed cases they are in as far as the date they were graded,
pre bar code and look to be from when he says he bought them in the 1970's
1880 s Morgan Silver Dollar MS 65 PCGS OGH 1280 | eBay
If he is not giving me a bargain I will cease my purchasing and not be out too much, I am just
curious as to whether it is a fair deal or not, again, sorry for any confusion I caused with my
non specific post.