Hi,
you might want to consider Avent ISIS Duo pump $150 price negotiable. Its the same as old avent model.
I was told the parts looks yellow (original colour) & do not mistaken for discolouration. All parts required are in picture below. Including a manual pump.
No warranty. self collect Bukit batok east. Still in Good working condition. Last used early June.
To let go quick as my sis gave me a new one. And I am reorganising my stuff.