Sign-up today for Yahoo! Search Marketing, and you get a $50 free PPC credit:

Offer open to new Sponsored Search advertisers only. (A new advertiser is one who has not advertised with Yahoo! Search Marketing for the past 13 months). Each account requires a nonrefundable $5 initial deposit. Advertisers signing up for Self Serve will receive a $0 credit into the account. Advertisers signing up for the Assisted Setup service will receive $0 off the $199 service charge. In each case, initial credits are nonrefundable and will be applied to click charges. There is a minimum bid requirement of $0.10 per click-through. Limit one offer per customer, and one use per customer on a single account. Sellers of certain legally restricted products may require third party certification at extra cost. Search listings subject to editorial review. Offer may not be combined with any other offers or discounts, separated, redeemed for cash, or transferred. Other terms and conditions may apply; see Advertiser Terms and Conditions when you sign up.