Same here, got the 8 coaches minus DVT from Rails for under £18 a coach, albeit there were some shipping costs.
Hope I can get a matching DVT and maybe a Class 91 with these.
I'm not sure why the discount though; Is the Intercity 225 on the more niche side of UK railway modeling?
Anyway here are some thoughts on the model:
The silver window outlines seem to not match the moulding, this wasn't the case for Mk3s. Its pretty unnoticable though.
I appreciate the alternate couplings that were given. The continental European loop coupling gives closer coupling than the tension locks, and the bar coupling shrinks that gap further, to less than 2mm.
I am not sure how flimsy the bar couplings are, and I don't want to risk breaking them, (had that experience with the 2-BILs, though a different bar coupling) so I will be ordering Hunt couplings.
The NEM prong on the couplings seems to have variable size tolerances across the coaches. One of the pre-fitted tension locks were too tight and the rounded ends are too big for it to pull it out, and it stops mid way when I try. It's a mystery how that got fit in the first place.
Not sure how to resolve that at the moment.
But overall, for the price I paid I think it was worth it.