Nice find; I can't imagine the guy selling that stuff, but maybe he had health issues or had already gotten replacement items.
When I was somewhere around 8-9yrs old, I still remember my dad selling his M1 carbine for 150.00 at a garage sale. I was too young to be aware enough to ask him to save it for me, but I still remember felling "weird" seeing it go. I recall later in my young adult life telling him i wish he'd have saved it. This was a different era and he just had no use for it; he got it right after he left the Marine Corps and by the time he sold it he was older and busy and didn't care much about target practice anymore.