Timbo where can you get a decent skateboard or BMX bike for $50.00? 7-8 years ago when my son was into skateboarding it would cost me close to $200 ever six month or less...a good skateboarder buys separate Decks, bearings, wheels and trucks...you can easily spend over $50 on each item.
The monthly cost of him being on the High School sailing team was no more per year than the skateboard itself...not counting the cost if he went to a "skate park". Parents usually find the money for what their kid really want to do.

Regards,
Bob