Hard to say. Generally if it´s a complete bike in tidy original condition, but not mint or over restored with loads of new parts, then you´d expect to get £2500, basically with the triples you take the engine cc and multiply by 10.
You will see H1s and H2s on offer for over £10k, but you need an expert eye to spot if they´re not made up of parts from different years, and if they´ve been