You can just go there and buy
Myself I just walk in and pick out what I want. You can see exactly what you are buying.
You can buy online and pickup at store too, this way you can check if item is available beforehand, usually it is ready for pickup in an hour.
Yes you can easily buy at store. No need of ordering online first. Advantage is - you will be able to see all the models first hand before buying.
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