I've used groups like stayxs.com. The theory is that you can negotiate a better deal on foreign hotel rooms with incountry expertise and aggregation than by using the standard reservation networks (Orbitz, Expedia) which flag travellers as high-paying Americans. I successfully used one in Thailand a few years ago.
So I tried it for India (specifically New Delhi). Dismal. 2 out of 3 hotels had no rooms available (although the site said they did and let me go through the entire process). The one that did is listed at $114 on the front page, $207 "post-lookup", and $295 in the email confirmation the next day. Speaking directly to the hotel, they had a suite at $275 and a regular room 2 of the 3 days at $175.
And what's worse, the "lookup" still shows availability on all 3 hotels at the same grossly understated prices. Clearly a group (a global operation, however, which tricked me) to be avoided.