Offer the whole batch for sale on eBay and I'm sure it would bring in more money than the bike, and should be easier to ship.

I have a whole bunch of die-cast model cars that I could probably sell on eBay and get enough money for a new bike. The problem is that most serious collectors want stuff in original boxes, preferably never opened. Almost all of my model cars were removed from boxes, most of which I did not keep. If your Hotwheels are in boxes that is a real plus for collectors.