Sodastream source $49.99 ($149.99 regular price) / Tamarack Wal-Mart (SE Edmonton)
They had about 10 left and also comes in White which they had.
Also they have the Fizzi model for $49.99 (reg $119.99) too.
Not seeing this discounted at other WMs in Edmonton area when using Stocktrack.ca so appears to be this store only. Good luck!