"You forgot to add another $300 for a cartridge itself prior to the cost of refurbishing service. Some people charge much more for 103 mod, the total with cart itself can be near $1k. Look at the prices for Zu DL103 or Anna Mighty Sound service etc."
Re-read the thread from the beginning my friend.
He paid the cost earlier, it does not change the total value, cartridges are not free. It is better to buy a good cartridge from the start than to try to make a bad cartridge better. Anyway, this is just my point of view.