I'm pretty sure the MSRP on those tires is $74.99, so I'm guessing you bought them at full price plus tax and the shop put them on for you for free. Yes, you can get them for much cheaper on the internet and it's not a hard job to do yourself. I hope you really like your local LBS because you are doing a really good job supporting them. Reminds me that I probably should go drop some coin at my LBS of choice to make sure they stay in existence.