I think the days of basschat being a lovely community where people sold on to fellow bass geeks and no one was trying to flip gear have well gone.
Though I think we have to be careful with the why, not everything is people selling for profit, sometimes time passes and prices change, sometimes things get more desirable quickly - or other times people are having to sell gear for cash very quickly... I have a Lakland which I tried out and liked but was swithering to buy it or not, the guy was like "I need the cash for a car, it's a good price, please buy it" and came around my house to sell it to be en-route to the car dealers...
What I normally do when selling is have two prices in mind. My mates-rate basschat price, and the advertised price, you know what - there's a big chunk of basschatters who will get it at the lower price, but the asking price hopefully scares off any flippers.