Rather than steal a thread I thought it would be best to start a specific one asking for help on the Trials type bicycles available in the US.  It seems the UK has a full range of bikes but the market is limited to high end stuff in the US. 
More details  on my situation -  
60 yrs. old, novice motorized trials rider (SCORPA), looking to have a practice bike I can ride with my 9 year old grandson and practice in the winter riding around the garage.  I don't see myself doing anything very strenuous    so I don't really want to spend $1,200 for trials specific bike.  Based on my limited investigation, it seems that the TREK JACK2 would be perfect:   
26 inch wheels 
Front suspension 
Lot of room over the top bar to prevent damage to private parts in case of a "get off". 
8 speeds which would allow riding it to a local area rather than having a single speed which would limit road riding. 
Front and rear disc brakes (good or bad)? 
Can be used for easy single-track (?). 
The reviews seem to be very positive and I have a TREK dealer close. 
So - Good choice or is there something equivalent for 1/2 the cost? 
Thanks in advance.