The
Avenir Mule is OK too at just shy of £90
It does fold up flat though base is solid so no folding further than base size
Pros: Easy to fit rear lights (smart light brackets fit the side frames), Cheap and cheerful, folds up and wheels drop out to store flat.
Cons:
Really needs some reinforcement along the sides to prevent load slipping and the sides rubbing the tyres. (bold to emphasise the one serious weakness to the extent that modification is necessary). Bearing-less pram wheels, not really up to longer distances