TANOS has two "standard" configurations:
- Anthracite with Anthracite features
- Light Gray with Blue features
These are their "volume" plays and both are sold /by TANOS to whoever/ at the same price. That said, TANOS does NOT sell directly. Not unless you are a business with a signifficant order.
They have no retail "arm" so you will see prices all over the place. Depending what path /time, how many resellers, mode of transport etc./ the stock took to reach its final shelf/etail store.
It is easily possible Toolnut got the Anthracite ones at a high price - be it from a special order or whatever - and so stuck with it - that would also explain they sold out of the Light Grey ones while these stayed in stock ..
There is little point in trying to dig into these "anomalies". Not unless you want to dig into the Toolnut internal finances, that is.