function custom_get_increase_bid_value( $metadata, $object_id, $meta_key, $single ) {

	if ( isset( $meta_key ) && '_auction_bid_increment' === $meta_key ) {
		$product = wc_get_product( $object_id );

		if( (! $product) || $product->get_type() != 'auction' ){
			return $metadata;
		}

		$bid_value = $product->get_curent_bid();

			switch ( $bid_value ) {
				case $bid_value <= 25:
					$auction_bid_increment = 2;
					break;
				case ( $bid_value > 25 && $bid_value <= 80 ):
					$auction_bid_increment = 5;
					break;
				case ( $bid_value > 80 && $bid_value <= 230 ):
					$auction_bid_increment = 10;
					break;
				case ( $bid_value > 230 && $bid_value <= 750 ):
					$auction_bid_increment = 20;
					break;
				case ( $bid_value > 750 && $bid_value <= 2000 ):
					$auction_bid_increment = 40;
					break;
				case ( $bid_value > 20000 && $bid_value <= 6000 ):
					$auction_bid_increment = 80;
					break;
				case ( $bid_value > 6000 && $bid_value <= 20000 ):
					$auction_bid_increment = 200;
					break;
				case ( $bid_value > 20000 && $bid_value <= 50000 ):
					$auction_bid_increment = 500;
					break;
				case ( $bid_value > 50000 ):
					$auction_bid_increment = 10000;
					break;
			}

		return $auction_bid_increment;

	}

	// Return original if the check does not pass
	return $metadata;

}

add_filter( 'get_post_metadata', 'custom_get_increase_bid_value', 100, 4 );