Logo to promote 'Risk free house selling'

Professionals

The Real Estate Professionals are a group of real estate agencies in Australia.

One of the services our clients may choose when they list their property for sale is “Risk Free Selling” which means that the Professionals will do all the advertising & marketing and will only be paid in the event their property is sold and the selling fee includes all advertising expended. Even if The Professionals have spent a considerable amount on the advertising and the client (seller) changes their mind and decides not to sell then they do not have to pay any advertising at all as The Professionals take all the risk on the advertising expenditure.

This is in contrast to most real estate agencies who charge for all advertising expended even if the property is not sold.

We are seeking a logo or graphic which helps to convey the “Risk Free Selling” benefit the agency offers. Nothing too whimsical as we want to promote a safe and secure image however do not be discouraged from taking risks or thinking outside the square.

The logo should not mention "The Professionals" name at all, however our corporate colours are green, blue, red and yellow so some combination of one or several of these colours would be considered, but the logo does not have to feature these colours per se.

We're looking for a serious and trustworthy vibe, a typical fee for selling a house is $10,000-15,000 so we obviously want to portray a feeling of honesty and professionalism.

UPDATE: Thanks for all of the submissions so far. After consideration we've decided we'd like to see some ideas based around the following concept: a circular design (like a wax seal) with the words "Guaranteed Risk Free Selling" around the circle, and in the centre a house with "SOLD" placed on top of it, at an angle.