Hi! My name is Sean and I'm really looking forward to getting to work with you. I'd like to create a desktop application with the basics (buying and selling according to your script) within a few days, and then deliver a second version with more advanced features within a week after that.
Please contact me with any questions or concerns, I would be more than happy to explain anything that is unclear.
Thank you for reading this, and I look forward to the chance to get to work with you!
Thanks,
Sean