Today I have received a shipment notice from HLJ about the "Yamato parts" and those parts are really expensive 1500 yen each arm/shoulder: 
 
Dear Sebastian Bravo,  
This message is to let you know that the following merchandise has been shipped to you from HobbyLink Japan. 
Invoice Number: 744182 
Shipping Address: 
 Sebastian Bravo 
 Miraflores 178 Piso 16-17 
 Santiago Centro 
 Santiago, RM 832-0215 
 Chile 
Shipping Method: SAL - Small Pac 
Click here for an estimate of shipping times 
Order Number: 01325237 
Item Code                               Item Name        Quantity       Price       Extended Price  
YMTPARTS                               Yamato Parts     4                 1,500                   6,000  
Merchandise                                                                                         Total: 6,000  
Shipping Charge:                                                                                              580  
Total:                                                                                                            6,580  
Details about how your items were shipped are shown above. If your package seems to be taking too long to arrive, be sure you check the FAQ on our website at http://www.hlj.com/faq/q12.html for information about shipping times before you contact us. If you need to reach us about this shipment for any reason, please make sure that you include your customer ID and invoice number in your message to us.