price_options.php

$options = [
  1 => '$1',
  10 => '$10',
];

if ($path == 'liberia') {
  $options = [
    2 => '$2',
    100 => '$100',
  ];
}
$form['price'] = [
  '#type' => 'radios',
  '#options' => $options,
];

return $form;