Those are great questions.
Regarding the Instrument Cluster, if it's overpriced now it's simply because it was overpriced then. There are definitely some characters here that enhance the cluster and I'm only asking close to what I remember paying for it. Whether these things appreciate or depreciate in value over time, who knows. So I posted it for what I remembered paying and you see who's interested.
As far as the VDO Boost Gauge goes, do realize that it's not just a gauge I'm selling but the custom molded A-pillar as well and as stated, the pricing is simply the equivalent of what it'd cost me to get the equivalent for my current VW.
Doing my part though, I do see that their cost of the solution has gone down and thus my price should reflect to match.