Danielle
DC calipers range dependent on condition and colour.
I have found over my limited time in this hobby that some colours go through 'fashionable' times.
Popular colours red/blue/black can fetch premium prices in NOS/Mint because they can go with lots of colour combos.
Gold, in my eyes, seem to be unloved unless somebody is building a Burner or SE (I'm sure there are other classic gold combos that escape me at the minute) and CAN be found at a lower price.
NOS DC MX1000 single calipers can range from £75-£100 at the mo, sometimes higher.
This is just my humble opinion and not a statement of fact.