I made like 20 million IGB bells bc I filled my entire inventory space of turnips and caught someone here who posted that their Retail is buying turnips for about 800
But bc I don't think this game is that active anymore I think its harder to find good prices now days :<
Collecting fruit helps. Or just straight fishing/bug hunting. Doing favors for villagers get you random items you can sell. You can trade tbt with people on here. The basic currency exchange from tbt to igb is about 200,000 igb for 1tbt. Shake trees for bells, furniture, and bees! Catching bees is profitable. You can shake trees with your net and then catch them. I think bees go for 1,600igb and the comb is 500, i think.