Almost got taken on facebook marketplace!

I thought i was being taken for a ride on fb marketplace.   Probably a good thing bc i was wanting more and more like an addiction 

 Here was the listing for  $50

The seller came back that night about the circled minifigures

The rest played out in Texts from marketplace 

I ended up getting everything I paid $50 for (the asking price) minus the 2 torsos

I'm so curious if I was overreacting by not giving the 2 torsos??I dont know.  I guess its the principle of changing what I paid for.