$18.00 for a multi kit??? You did good, no, my kits were that price BEFORE shipping. I purchased online from Foster and Smith I think, or Marine depot. My LFS only sells Red Sea master kits and they were all expired before I bought them. Which is why I went online for test kits. I do have one store that will order for me and then they pay shipping...I got a deal at $40.00, F&S wants $49.00 before shipping for that kit.
I don't buy anything from Amazon.com because for the life of me I can't remember the dang password or username and without it, they won't let me buy anything.... so I gave up. I tried making another account but it says my e-mail is already in use.