Your need is your need only, which may be totally different from an average buyer’s need. It is preferred that you check the entire gamut of products available with the shortlisted sellers so that you can be sure that you are buying exactly what you need. Some sellers do not mind designing or supplying the barrier gates for parking of your customised need if you are placing a bulk order. One great way of knowing this will be to contact the seller over email or telephone and get a quick knowledge about them.