Replying to [Harjeet]:
Dear Harjeet,
For sample, if the buyer should pay for it or not, I think it depends on the cost of the sample.
If there is the cost of goods is little, just some air freight. Ok, I think the seller can send you free. However, if the sample is costly, the buyer should pay for the cost of the sample and air freight.
Best regards,
Tony Han.