You are not allowed to buy or sell second hand seat belts. Its illegal to do so. Meant to buy them new and thats it so keep that one on the down low if you find any.
"Haha good luck unless yu buy one off import monster and change the kms gauge due to them all have cvt lights on it but wouldn't be to hard they are about $60-80 I think for memory I'm going to get one
Low the JDM ones dont work properly in the UK built micras as they have different gauges. There is plenty of info on here about it if you search for it.