Probably not a lot, it's rare for bikes to turn into real collectibles. Your best bet is to look at Craigslist/ebay or similar to find out what comparable bikes are selling for.
$400
To determine the value of your bicycle, you can consider factors such as its brand, age, condition, and any additional features or upgrades. You can also research similar bicycles for sale online or consult with a professional appraiser for a more accurate estimate of its worth.
I learned to ride a bicycle when I was seven years old.
Examples... We both have bicycles. I have a brand new bicyle. He has an old bicycle. His bicycle has a flat tyre. My bicycle has good tyres.
The appropriate size for a 5-year-old's bicycle is typically a 12-inch wheel size.
The recommended size for a 4-year-old's bicycle is typically a 12-inch wheel size.
That's like asking how much is a brick worth? It depends on the condition of the brick.
because
The recommended bicycle size for a 4-year-old child is typically a 12-inch wheel size.
The recommended bicycle size for an 8-year-old child is typically a 20-inch wheel diameter.
You can recycle old bicycle tires at a local recycling center or repurpose them for DIY projects like making garden planters or belts.
You can sell your old bicycle at a local bike shop, online marketplace like eBay or Craigslist, or through a garage sale or classified ads in your community.