There is a members market on this vey forum. Unfortunatley you need to have been here and made a few more posts (not spam) to be able to access this.
My suggestion would be to stick around, use the search function of the forum, read a lot, ask a lot of questions, do your research and by that time you will most likely be ready to purchase your own decent watercooling setup. You will most likely then have access to the members market which will allow you to buy products off other members at a fraction of the new price.
Everyone here is friendly and helpful and will no doubt talk you through every stage of watercooling, from purchasing to installing, to tweaking, even to taking pics and showing off your new pc!
Good luck.