this is what i get for buying parts pumps.but i am poor!! should nave saved my money and got good ones.i spent 1 1/2 weeks on the milk-can.i have a lot more to go.charley
... Actually you're doing pretty good!
Good condition visible parts are worth good money and yours are in nice shape for being almost 100 yrs old.
Bonnet pieces in good shape are very desired because they usually are the first part of the pump to rust so people need them the most.
I would check to see if there are more parts to them from where you got them and if not then...
Step one is to id them and then find out if anyone is reproducing them (for pricing and availability) and then price them accordingly and get them out there for sale.