KEY WORDS Optimization Urgently

I'd like to have these key words: group buying|group buying sites|deal a day at [login to view URL] to get good position at [login to view URL], payment will be given this way: milestone for each month, the rest to be made when get good position after I checked, at least I'd like to work with you for 3 [login to view URL] can talk later in the bid you give wht best position you can give me, for example, in 3 months you can make our key word: group buying at top ten position, then I will give you the rest payment, or in one month you can make our key word: group buying at top 20 position, then I will give you the rest payment of one month, and finally release the milestone payment by each month. Pls feel free to vote. For price pls provide me the fee of one month. My target price would be no more than 100 USD each month. This is very urgent, pls bid asap. Rgrds, Aidan