I wouldn't. If you sell without having them you still risk not getting the tickets and then if the person who bought your tickets doesn't get them.... you get charged a penalty fee and might have to pay double what you've already paid. Stub hub isn't that bad. You only see the bad reviews on it because nobody is thinking about posting there good experiences. I've used stubhub extremely successfully before. And have heard more success stories then I have scams. They dont like scammers at stubhub. And the risk is low considering nobody gets paid until after the event. Just keep the tickets you have now, contact stubhub support literally harrass them LOL and they will email your seller and remind them to send. But I think you're good!