Is it worth trading up?

[prodigit]

Yeah, they're still going to cost you $3000 total, and are much lower quality than a second hand motorcycle (eg: sports motorcycle like a Ninja, or 250cc cruisers from Suzuki, Honda, or Yamaha/V-star). Most of those motorcycles you can find for $5,5k, second hand sometimes lower than $4k.
If fuel economy is what you want, a Ninja 250 can be great at fuel economy, especially when not ridden hard, and a Suzuki TU250x's fuel economy is great too!

Just giving you some other options to take a look at, before you commit yourself to a purchase. Maybe there's something out there that might suit your needs better? (just saying)