So we usually do our regular online shop at Sainsbury's, because this is one of the very few supermarkets that shock what DH likes for his dinners (very restrictive dietary needs).
Anyway, I've just noticed Morrison's sale the same thing for cheaper, it's on offer. Only about 30p difference, but we by several of these so it all adds up. Plus, their basics are cheaper.
DH is putting his foot down and saying no, he doesn't want to try Morrison's.
I've asked why and he says there's no point. I said we could save £5/10. He said I don't really care about saving a few quid 
Yeah, like we have money to just burn 
So I asked again, and he said it's just too much faff to change.
I said but I've signed up instantly. He says no, I'm comfortable with Sainsbury's so leave it at that.
AIBU to think he's being bloody dim? Why wouldn't you save just a few quid? Why spend more money, even small amounts, when you don't have to?
He's adamant it's too much hassle. And says he isn't interested in saving a few quid. It's not worth it.
For context, either myself or him order the online shop. I was going to do it so it's not like he had to go out of his way to sign up or anything. I'd already done it.
In annoyance, he's agreed to add it all up and see if there's any difference at all. Sod's law it'll cost the same overall or be more expensive.
Not really sure why I'm writing this, perhaps I just need a rant 
He will most likely see the thread and get the hump. Hopefully it doesn't turn out that I'm U!