Just be careful, I got 2 cheap Tapes 200 meter long from Ebay seller from China, It costs $1 to $1.5 included shipping, I really doubt that it is parafilm, It is more like food wrap tape, I do not know the difference.
I may be wrong, I think that parafilm tape is an excellent breathable moisture barrier, while this tape may not be breathable.
Angela, I think that as long as it is less than $20, your shipment should be duty free and hopefully no broker fee, If they use USPS, it can go up to $200 and no broker fee.