Totally valid! I personally run a very high magic world where enchanted items are fairly common. Mind you most things above Uncommon in rarity are very expensive or quest rewards. I like the feeling of magic being a constant in my world, so I like to pepper in items that I wouldn't normally know about because I haven't read all of them.
But I think for DM's who run worlds closer to yours, I'll probably add a filter so you can exclude anything of a certain rarity or base price out. Thanks for the feedback!