Creating Powerpoint sales presentation to market new service

I am looking for a freelancer to create a 10 to 15-minute sales presentation using ppt slides and audio (or done as a webinar) for use in inviting professional service firms/practices to market their services online. I will provide details on content to be included in ppt presentation. This will include Frequently Asked Questions about the service, benefits of using the service and options for signing up to the service. However, I am open to suggestions on how copy can be improved and any additional information that would be useful to potential buyers. In addition to copywriting skills, I am looking for a freelancer who has experience of creating powerpoint slides presentations and working in B2B marketing. If bidding for this project, please send at least two samples of recent ppt presentations. For an experienced and skilled freelancer, this can be done in less than two hours, including proofing and making any changes required. So, do not bid more than $50 for this project.