(They probably still are, or at least pretty close to it.)
That informed my decision shortly after, when I built something similar - that video card model was widely panned by gamers (or more accurately, gamer 'influencers'), but it was an excellent choice if you wanted 16GB of VRAM with relatively low power draw (150W peak).
TFA doesn't say where they are, or what currency they're using (which implies the hubris of a North American) - at which point that pricing for a second hand, smaller-capacity, higher-power-drawing 4070 just seems weird.
Appreciate the 'on a budget' aspect, it just seems like an objectively worse path, as upgrades are going to require replacement, rather than augment.
As per other comments here, 32 / 12 is going to be really limiting. Yes - lower parameter / smaller-quant models are becoming more capable, but at the same time we're seeing increasing interest in larger context for these at home use cases, and that chews up memory real fast.