Good question , and has a very simple answer.
When you look for caravans for sale there are lots and lots of Jaycos for sale WHY. it's called market share.
Trackabout trailers are IMHO the best soft floor camper and as such they sell tarilers all over austraila not just within the state they are manufactured in.
This means that if manufacturer X sells 10 units per year and you see 1 for sale.
And Trackabout sells 100 units you will see 10 for sale. You get the picture
As stated same as jayco they have a 50+% market share so there are heaps second hand .Commodoore ,ford heaps second hand .Subaru,VW ect not so many its a simple case of Market share IMHO.
Bloody good for 2nd hand buyers though they get the best soft floor out there and get to pick the best one going and scopre a good deal.
As for me mine is for sale as we are moving away from a soft floor other than that reason I would always have a Trackabout.
Jetcrew