As an illustration of how unexpected things can happen if one has the patience, the observation and a little luck.
These 4x 650 Mole Richardson fresnels with barn doors, scrims and two good stands sat on the Kiwi internet (Trademe) for weeks at USD165. I watched them float by and did nothing. Later they appeared again at USD231 and sat for weeks. Still no reaction from me. The day I bid, someone else was onto it. So I paid a premium for my indecisive action. But USD297 is still pretty good.