If you want to spend money, you can buy a high quality vintage bike off eBay for the same or a little more than the cost of a big box store bike.

If you have a good frame, all the rest you can upgrade as your circumstances allow. But a heavy frame is literally impossible to fix from the start. Add to that the fact big box store bikes come in only one size, it makes it difficult to find a good riding bike that fits a new rider the first time.

You may save some money but its really is poor economy because the bike is poorly built, can't be upgraded and the ride is completely unpleasant. Spend a little more for a good bike and you'll be happier.

You can find vintage bikes made 15-20 years ago with high quality frames and finishes for around the same price you can get a new big box store bike today. What is the better value for the money? In my opinion, its no contest.