The Sunday BMX bikes are worth over $200 because they are really good bicycles.
Sapient bikes are a wonderful beginner bike for young BMXers.....much better than mongoose but not as good as Sunday
The Sunday times is worth 40p
These bikes are well worth starting at $200.00 if in good condition. It's a vintage model worth collecting as there are not many left.
The bike shop, Bike brewery any bike store pretty much.
not much but wtp or kink are
Most bikes are consumables rather than collectibles, so don't expect much regardless of what condition the bike is in. Your best bet is to look on ebay, craigslist or similar and see what similar bikes are selling for.
What ever someone is willing to pay
Fit Bikes are very good if you want to buy a complete BMX bike. Good value and much better quality than a department store bike.
Tech deck bikes prices start at about $15. There are however a very a wide range of tech deck bikes available. Prices can go up to $30 for a brand new bike.
Bicycles rarely become collectible, so probably not much. Your best bet is to look at ebay, craigslist and similar to find out what similar bikes are selling for.