Piano-Keyboards

Looking for a YPT 310 or 400 or 410,
maybe something in the PSR-E line, like the 313 or 413

Must be in Ontario Canada

Sounds to me like you need to change the YPT to a YPG, which means Yamaha Portable Grand. As far as the PSR models go, I'm not sure if Yamaha even makes them anymore. You could check on Craig's List for your specified models, or eBay.