Because It Is The Right Thing To Do

I purchased an item online but then my ordered never came in the mail after weeks of waiting and anticipation. So I emailed the seller that I never received the order and I got refunded in full for my purchase. Few days later, the order came in, just as promised! Now that Im fully refunded for it, I could have it for free and nobody will know (?) but I want a clear conscience and a peace of mind, so I get hold of the seller right away to let him know that I finally get the item late in the mail and that I am willing to pay the same amount that I originally paid for. Simply because I dont feel right keeping the item for free just because it came in late and I was refunded for it. Now that I got it, although it was delayed, I have to repay it, unless the seller replied me back and tell me that I can have it for free. But I might as well try to let him know that I got the item finally, you never know why the seller sold the item in the first place, maybe because he needed the money and sacrificed selling the item. Nobody is telling me to repay the item but i always try to live by some of lifes simple rules like honesty is the best policy.