Your question is very open. There are kitchen cabinets that cost 2-3k and some go as high as 40k. I would look at cabinet manufacturing companies; find the style you like, figure out the size, and how you're going to install it. Then shop for best prices. Theres a list of about 40 cabinet makers here - http://www.construction-bids.com/cabinets-install.php (anything from built in a box, semi custom, and custom) Look around and see which companies are making what you like, need, and is on your budget. Homedepot / Lowes isnt always the best quality or the cheapest.
This depends on the size of the cabinets you're wanting to buy as well as the type of material you want them to be made of. If you're getting a cheap set made of particle board, you can probably get by with spending about $800. If you're wanting some nice cherry wood, prepare to spend at least $2000. For more information see here: www.homedepot.com