I bought a new unused $40 First Years brand pump that I opened and have ready to use (box is gone). I just found out I'm getting a free Lansinoh pump from insurance. Which pump should I use?

pump that I opened and have ready to use (box is gone). I just found out I'm getting a free Lansinoh pump from insurance. Which pump should I use?" />

I'd like to sell one of them if I don't end up using it. I feel like it might be harder to sell the First Years pump since I don't have the box anymore and people may not believe that I really haven't used it yet?

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