OK, my perspective.
The Bauhaus horns were good - but they haven't been available new for many years now, so you'll be hiring a horn that's had quite a few miles under its belt.
Forget the Sakkusu. Their 'Deluxe' range barely made the grade in my books - and no matter what their blurb says the basic model is just A.N.Other Ultra-Cheap Chinese horn...and the used model at 2007 has nine years under its belt. On a good quality horns that's barely 'broken in' - on a cheap Chinese horn it's likely to be a very different story.
You're better off going for something like a Gear4Music and spending the saving on a proper setup. The Startone is likely to be comparable with the Gear4Music. If not the same.
I see you're in North Dorset. You're essentially a rather pleasant 90 minute or so drive from my workshop.
So I'm gonna put my money where my mouth is and offer this deal.
Get the bloomin' Startone fer gawd's sake. Bring it to my workshop with £40 in your hand (and a sticky bun). I'll check it out for free (that's a standard for any client) and tell you whether it's a keeper or not - and if it is, I'll do whatever tweaks it needs to bring it up to spec for a set price of £40. If it needs more work, that's on me.
But don't do it for the next fortnight as I'm knee-deep in pre-tour work - and those guys always come first.
And before anyone accuses me of being a big ol' softy I'm merely doing this to bring this never-ending thread to an end