You didn't mention the ratio of your 120S saildrive, but the attached quote is the same whether you have the 2.19 or the 2.47:1 ratio.
Volvo Penta replaces the 120 saildrive with the 130 saildrive. If the serial number of the sail drive is below 3101089439 then you need all the parts in the attached quote.
If your serial number is above 3101089439 then you need to just replace the saildrive and the coupler (3885414).
Although the 120S saildrive is no longer offered by Volvo Penta I do have a good used one for $6,450.
All prices are quoted in U.S. dollars. While Marine Parts Express will attempt to minimize the amount owed, any duties or tariffs are the responsibility of the purchaser.
Thank you and please don't hesitate to contact us if you need any more information or would like to place an