Hi & welcome! High-quality wind chimes will be musically correct, as previous comments have mentioned. They should match the notes on a piano or other musical instrument, and the tones should be in harmony with each other. They are expensive. I have one that I was able to keep after working in sales for a company that makes them. If I'd paid retail for it, it would have been about $250 almost 20 yrs ago. I keep it inside except for special occasion days when I take it outside because I don't want it to degrade in the weather and I can't sleep if a breeze makes them ring.
I also LOVE bamboo chimes, which make such a pleasantly tropical, beachy sound. I'd love to have some bamboo that I could use to make one, or more, but none of the bamboo I could get to is fat enough for the deeper sound I like.
For any hollow-tube-type wind chime, the longer the tubes, the deeper the sound will be. In addition to garden centers, gift shops and religious stores are other places to look, and sometimes big truck stops will have a rack of these. I now live in a rural area and understand the necessity of buying things online, but if you have a chance to shop somewhere in person, that's be the best way to know that you love the sound of a particular one.