Explainer Video for e-commerce financial services startup : 45 - 90 second

Project Description:
I'm looking to have an explainer video made for our website which is an e-commerce portal that deals in buying and selling foreign currency (foreign exchange) products in India. You can checkout our website: https://www.bookmyforex.com for more details.

The video duration should be between 45 - 90 seconds and explain our transaction flow and our unique selling points in a simple and fun way but not in a childish way.

Regarding the video style, it can be regular animation, kinetic, or whiteboard/ sketched. Although we'd probably prefer the first 2. Some of the videos we like a lot ourselves are:
Mint - http://vimeo.com/22764410#
Padmapper - http://www.youtube.com/watch?feature=player_embedded&v=eN8nDVGfdZM
ZenDesk - http://www.youtube.com/watch?feature=player_embedded&v=VxgDuqmlEQk#!

As of now, we haven't written a script or storyboarded at all. We're debating whether to write the script ourself or to have it written by the video agency. And we may need a voice talent as well. So when stating your quote here, please make sure to break down the pricing of your services as such:

1. Video Production (including background sound/ sound effects)
2. Storyboarding +Script writing
3. Voice over

AND PLEASE MAKE SURE TO POST A LINK TO YOUR EXPLAINER VIDEO PORTFOLIO

We're a startup and therefore have a startup budget. However we are certain to have new video requirements for different demographics and we'll certainly like to create a long term relationship if you do a good job.

Thanks and looking forward to your response