Good on you mama!!! I had to supplement my ydd with donor milk so I totally appeciate what your doing.
As far as buying a good used pump, hygiea and ameda (purely yours) are closed systems (unlike medela) so they are less likely to be contaminated or have the dreaded moldy motor.
Good luck mama!!
Hi I'm Candice: mama to E, A,and B. Wifey to K. On the road to being debt free with Dave Ramsey!