I can easily find 4kg for $40-45 online, or if I am patient I can grab 1kg for $10-12 on sale. You may be looking at more advanced materials like carbon fiber

I can easily find 4kg for $40-45 online, or if I am patient I can grab 1kg for $10-12 on sale. You may be looking at more advanced materials like carbon fiber or fiberglass reinforced filament for printing larger parts that take a load/stress.