Have a look at the Bosch Rotary range. I recently picked one up online for £90.
is it any good ?
Try a local Honda dealer for ex-demo/previous season models. I picked up a new one (last season's so was on special) for about £140.... Petrol, rotary and self powered drive. Still came with full warranty etc etc.
Honda 4tw
Moutfield
Uncle has used one of these for years with no issues. Im now the one using it and its brilliant. Not sure what make his is but always swears by them