I think it's cheaper and cost-effective if you source these antique tiles from the place of origin itself if the place is not too far from your hometown. If it's in another continent and the plane fare is steep, you could compare the prices of the tiles from your local sources and the prices of tiles from the origin plus air fare plus miscellaneous expenses. If it's far more expensive to source the tiles from its original manufacturing place due to shipping or travel expenses, you could just opt to get these from the local supplier.