In one year there has been a big time increase of rigs on the market. The economy is still good, but if there is just the slightest glitch you are going to see the demand for rigs to racers drop dramatically and than the conversion companies are going to be in trouble.
It does look good for the guy who wouldn't mind a 3 or 4 year old rig, as well as the DIY guy who wouldn't mind taking a one off and doing some updating.
In my opinion these conversion companies better start looking toward the RV market as a possible avenue to get them through the upcoming years. I still have yet to see any one of them make a rig geared towards a RV'er. I would say Kingsley comes the closest, but they market to the very high end.