I'm going to disagree with most people here and say No, you weren't taken advantage of. Afterall, you asked for a quote, were given a quote and then you have the opportunity to decide to buy or not, after doing research.
Keep in mind, when it comes to LFS, their cost, on equipment, isn't much if any lower than you can buy on your own, online. With the many internet vendors available, we customers can buy nearly as cheap as the LFS can buy. As an example...
I recently wanted to purchase a skimmer from one of my favorite LFS, the same one OurReef referred to above...
Because she only had one supplier of this particular skimmer, her cost was more than if I were to buy it from one of our R2R Sponsors. There's no way she could purchase this skimmer, from her supplier, and make any profit, when customers could purchase it directly from another source, cheaper than the LFS could purchase it from her supplier.
Unfortunately, this is a very common scenario, putting a real hurt on LFS, who have much more of an overhead than most online vendors.
LFS must make a profit to stay in business. If I can purchase a skimmer, online, for less money than a LFS can purchase the skimmer, that LFS has to make tough decisions...
Do they NOT carry that product?
Do they carry the product and hope for the ocassional customer that needs it NOW, so purchases it from the LFS instead of online?
While my example was a skimmer, this is true of most equipment. It makes it very difficult on a LFS to compete, especially on entire tank packages.
While the tank is usually purchased from the LFS, keep in mind, they have very little markup on the tanks, so there's very little profit involved. The LFS has to build their profit into the other equipment and livestock.