Tip: Once you have 100-200 gold, stop selling your fish. It's better to bank them, as having food is good for training. Then camp rats in the dungeon, as they drop tomatoes - Free food for more training. Keep training till you can fight harder monsters.
Here's a thing that I do, in case I die. If I get some equipment as a drop, I'll equip it. If I already have it, I'll bank it. I'll keep at least 2 in bank, and keep one. Sell the rest. That way, if I die, I'll have a back up in the bank. If I die with the back up, I'll have another back up just incase :)
Here's a suggestion: Trading with other players. We can trade any units with another player, this will give useless rare units a reason to be kept (I.e gold generator could be traded to a new person for a rare unit they may have)
Players who didn't like that game noted it as malicious site, will be fixed soon, so far can be added to exceptions