They should be the same quality at your local farm store as the ones you custom order as long as you are comparing the same brand. i.e. DuFlex tags at the store and DuFlex tags on line.
The exception to that, that I know of is most stores don't carry laser printed Z tags.
You will just have to compare prices. You'll have to buy a package of 25 tags at the local store. If you go on line somewhere like
The Cattle Tag Store you can order 1 tag if you choose.
I prefer A tag style one piece tags either Alflex or Z tags.
If you are new to cattle and ear tagging I would recommend this style. If you miss the tag is still usable and you get to try again. Two piece tags once put together are stuck together. You either have to cut the button or have a special took to remove the button from the tag.