I'm starting out to offer webdesign services to others. I see many templates for sale on ebay and other places, but they seem very common and nothing new can be found on them. Where could I find bulk web templates for various themes and at affordable prices?

well, if your "offering" web design services....why not try actually designing something new instead of buying the cookie-cutter stuff?

monstertemplates.com is really nice, but you always have a problem with template sites in that they are not unique. Your best bet is finding an affordable web design company that can design you something that suits your business.

For FREE Open source, standards-based web templates (means NO TABLES, html and css !) try : http://www.openwebdesign.org/browse.php

You'll find some good stuff on sitepoint.com in the marketplace.

They have established sites as well as templates.

Template monster has alot of very nice and affordable templates if you are into premade websites .