I buy from home depot regularly, depending on my schedule if I don’t have time for cutting down to size I will buy 2’ x 2’ or 2’ x 4’ boards for most projects (quicker and convenient then cutting to size). I believe I pay around $15 per 2’x2’, or close to that. I would like to see $20 for a sheet of 750mmx750mm. I would buy in quantity and would love quantity discounts.