I was at Petsmart yesterday, and they had them "on sale" for $29.99.
Welcome to Fish keeping!
The good thing about the dropper bottles is that if you decide you want another tank (for quarantine, hospital or whatever) you already have more than adequate tests for that tank, and you won't have to rush out to buy more. Sometimes, I do multiple tests per day on my tanks, whenever they seem to be having a problem, and I do a lot of water changes.
Also, be careful with dropper bottle #1 of the ammonia test, it is straight up chlorine, and WILL bleach your clothes/anything it comes in contact with!
And a note about the nitrAte test. The instructions are very specific, and if you don't follow them to a "T" you will get a false negative reading. Here's a short overview:
Step 1) Add water to test tube.
Step 2) Add 10 drops from dropper bottle #1
Step 3) Cover top of test tube, and invert solution 3-4 times to incorporate the liquids together.
Step 4) Shake Bottle #2 vigorously for 30 seconds. (I use a kitchen timer.)
Step 5) Add 10 drops of Bottle #2 to the test tube. (Same, kitchen timer, or cell phone timer.)
Step 6) Shake contents of test tube including water+drops#1+drops#2 for 60 seconds.
Step 7) Wait 5 minutes, then read the results.