Vishal, starting your own plants from seed is a wonderful way to get plants that you want for less expense! Since you're starting them in the basement, I assume you are using fluorescent lights? Make sure the lights are just a couple of inches from the plants, and give them a good 15-16 hours of light each day; I use a timer so I don't forget to turn the lights on and off at the appropriate times. What are you planning to grow? There may also be garden club or other plant sales in your local area, or farmers' markets where people are selling plants. Happy gardening!
Welcome to Wisconsin! Another good thing to do is keep an eye on Craigslist and Freecycle. In the Farm & Garden area of Craigslist you'll often find people giving away plants or selling them cheap. Ditto Freecycle once it warms up and people start dividing their plants.
Yup -- Corey is the keeper of seeds this year... great guy.
FreeCycle is a great way to find plants... i gave a bunch away a few weeks ago... Too bad i live so far from Milw.
You could even try the Plant Trading forum... there are generally folks happy to give away plants for just postage.
You can generally get a large box for about 12bucks.
Vishal -- good luck on your new garden and Happy Gardening.