Hi Sparky
Just started trials myself, had MX bikes when I was a kid, then road bikes from 19 until I wrote my last one off in October.
I wanted to buy a Scorpa SY250 since I had heard good things about the Yamaha engine reliability.
Unfortunately the only one even close to here was a dog and on sale for £1300.
So I took some advice from my local trials club who said that really any of the good makes were worth having - Beta, Sherco, Montesa etc. Was steered away from Gas Gas due to reliabliity.
Finally bought a 2002 Sherco 250 for £890 off ebay from a local guy. Seems solid enough, chucked some coolant out on my first ride which I need to resolve but overall I am very happy with it.
Good luck and enjoy.