If you're already bottling in standard 12oz bottles and these are just for show, it becomes a matter of what it's worth to you to present your beer in swing tops. Keep in mind that if you are sharing beer with friends, over time they will disappear.
On the other hand, if this is for your primary means of bottling and sharing your beer, you'd be better off with recycled standard bottles. You can even get enough new bottles
for a 5 gallon batch for half of what you'll spend on these flip tops.