sorry to point out the obvious, why not ring a few of those store’s, a little introduction goes along way! build a relationship with them.
Some will let you borrow the item for a small insurance fee or no money at all if they trust you.
Some online direct to consumer brands for example Sonos allow you to try 30 for days for a no question asked refund.
Amazon will do the same.
@davidf here for example I’ve spoken to on a couple of occasions he is very forth coming and very helpful. Ultimately didn’t purchase anything but never the less a very helpful chap. Give him a call if he stocks the brand your looking for. If you’re in the uk that is
You are entitled to return an item if you don’t like it or isn’t fit for purpose but each store will have there own guidelines for this, and is normally a case by case basis, so best to ring.