We have enough money fora new stroller but that doesn't mean I'm going to buy a new one!! Second hand saves more $$ for my kids future and as long as it's in good condition, there's nothing wrong with it! There is something wrong with the mentality that you have to spend serious $$ so that a child doesn't have to have hand me downs. It's better to teach the virtues of being thrify & frugal so that you have food on the table, a roof over heads, maybe a vacation and a college fund rather than on everyday 'things'. Kids don't care about 'things', they want a stress free life and happy parents. I'm always happy as & clicking my heels together when I find fantastic deals. My most recent was finding pure wool sweaters for $3.99 at the local thrift store and I refreshed our pillow covers & made baby diaper covers out of them. You throw the sweaters in a hot washer to felt them and soak them in lanolin, then when pee hits the diaper cover they absorb and don't cause rash because lanolin has anti microbial properties. They're warm too for our Canadian winters.
Happy second hand shopping for a double pram, I hope you get exactly the thing you're looking for!