What exactly is store credit, (I speak french) and I searched on internet but I the result were that it was a sort of refund , I am not sure to understand.I had a little difficult time selling my guppies because my LFS is more interested in swordtails BUT it depends on your LFS. Call and ask around to see if anyone will give you store credit (don't ask for cash they typically don't do that). If they don't give you store credit they will probably take them for free. I do have another LFS that would have paid me $2 per pair so it just depends on your LFS and the market.