You're asking about film laminate or pouch laminate?

Pouch laminate is done by those stationary shops, price may be around RM5.

Film laminate is usually done by the printer, usually much much cheaper. But only the front and back is covered by plastic and waterproof. The sides are not, so if you hang these outside in the rain, the water will get in at the sides and eventually ruin it. However, film laminate will make the paper tear resistant.