I've quickly found out that a higher mileage bike causes you money if the previous owner didn't keep up with maintenance. Mine has 18,000 and I'm replacing the chain and sprockets, a new rear wheel, and all the fluids changed. But for the price I paid it's still a good deal. I would pass on the higher mileage bike like others have said and they have more experience than I do. Welcome btw, I'm in the same boat.