I don’t know the market in your area, but you can buy a nice used 350 Meteor in the U.S. for under $2500, though you may have to shop around a bit. It’s also smart to buy used because what is your ideal first bike isn’t likely to be your ideal bike once you’ve gotten some miles under your belt, and having bought used you’re not going to take a big hit when you sell it. I’d steer clear of cheap, obscure Chinese brands, and instead focus on a nice used Japanese bike. If retro styling is your thing though, you’re probably not going to beat a used Royal Enfield on price. The SYM Wolf 300 and 150 might be up your alley, but they’re no longer being made by SYM and there aren’t a ton of them out there, so it would probably be tough to find one. If you’re mechanically inclined, an older Japanese bike would be cheap and reliable, but being carburated they tend to require a bit of tinkering now and again, especially if they sit for a while without having the carbs drained of gas.