I bought a secondhand Avent Isis to use while traveling and I've found it really handy to have a manual pump as well as my Medela Swing. But, my cat is rubber/silicone obsessed and has just bitten the valve to pieces It's cheaper to buy another pump than to replace the parts
I only got the Avent last time because it was local and I needed it quick. It was fine but not ideal, is the Medela better? It's this one that seems to be available second hand, not sure if there are others.