@glennewdick Just saw a near-new MC275 for sale in silver. Never before saw a silver Mac component in 40 years. So that would be a candidate at $5250.
Every 275 I've ever seen is two tone sliver (polished stainless) on the top front and part of the sides with the bottom section black with the large MC275 name plate. very nice looking IMO. Note the tube cage is black but not needed. there are a few rare gold plated ones.
for the price you listed it should be a Mk6 at least, current version.