I'm sorry but I just don't agree.
You are implying that the hoses I refer to must be of a lower quality, but neither you or I have proof of that. All I will say is that the person I'm referring to has an excellent reputation in the 205 world, as does Autolusso in the Alfa world.
The part below is smaller, granted, and so uses less material, but IMO is a more complicated shape with the addition of machined parts in it's construction. I know of at least one turbo charged Mi16 engine that has this fitted without problem, so your comment about suction doesn't stack up here. In addition, with the Mi16 engine conversion no longer being 'in fashion' these days, this part is not going to be bought in the same volumes in the 205 market as the Autolusso part may well be bought in the Alfa market.
£50 versus £80.....
Baker Bushes & Mountings - Performance Bushes, Mountings and Silicon Hoses
At the end of the day though, if other's feel the price is not expensive for what it is, it'll sell. Given the absolutely ridiculous increase in prices of induction systems in recent years - CDA and Viper et al - I'm hardly surprised that a lot of owners don't/won't find this expensive. The tuning industry is like a license to print money in some respects these days.
Personally I'll be going down the route of a cheap silicone elbow and adding the necessary fitting to the side for another few quid, and that'll do me just fine. If it doesn't work (leaks/collapses) or doesn't last, then I'll have egg on my face, but I only tend to gamble on cheap solutions if I think they are a safe bet. I'll buy the expensive product if I think it's necessary, but not for the sake of a brand name.