Over the years I've bought them countless gifts for meals out weekends away or tickets to shows and I never ever hear them say they used any of it. I'm inclined to believe they either let it go to waste or give them away. They just don't like socializing.
Last year I bought them individual gifts and when it came to ds birthday they had left the receipt of the jumper I had bought my dad which was exchanged for ds birthday gift in the bag this doesn't bother me but again I failed to get them something they like. They live in a small two bed and it's only two of them so I thought a cordless vacuum might be a nice gift after I recently bought one for myself I am really loving it. I haven't seen them yet but I'm having second thoughts is it a good present or should I run change it now 
they're in their late 50s