Hi Greg,
I never used to remove my pricing post completing of a sale.
There were few instances when I deceived to let go of something at a really low price, basically a crazy deal.
A few years later, when the buyer decided to sell the item, he was asking market price for the item. Unfortunately, he had many people haggle him on the price simply based on the price he purchased from me (because I never removed my listing).
This has only happened a couple times, but it made me reconsider whether I should leave my pricing up.
Frankly - I'm not sure what is right or what is wrong

. I'm happy to do whatever forum etiquette suggests

Since the buyer was from another site, I'll share that my asking price for the package was $180. I had numerous (10+) interested parties at that price, include some willing to purchase at my full asking price. However, I sold these locally for slightly less for the sake of avoiding shipping (even though I had the original boxes).