Yes, I agree. It's best to look through a set first if you can.
Having said that, both my sets of binos I've bought without looking through them before!

My first pair of binoculars were the Pentax 7x50s. They were superb when new - razor sharp to the edge of the FOV. 25 years on they are still pretty good

but maybe they could do with a service/collimate

.
I also have the 20X80 AOE triplet binos. For the money, I reckon these are great value, however they aren't in the same optical league as my old 7x50 Pentaxs. The middle 1/3 to 1/2 of the FOV is sharp, and just a touch muddy around the edges with maybe a little bit of coma. Generally the CA is good until you get onto something really bright like the moon - I often notice some yellow or purple fringing around the moon, but the surface of the moon appears sharp. It's rare to notice the CA on any other objects.
Hope this helps,
Al.