Ultimately it comes down to who you know. If you buy from / sell to a Basschat newbie with 37 posts then there's not much point expecting anyone to be "community minded".
The vast majority of my trading (of which there has probably been far too much) has been with Basschatters I knew, either in the sense of them being long-term regulars on here, or in the sense that I had actually met them in meat-space, had a chat and maybe a beer or two.
One of the main reasons why I trade here far less than I used to is that most of the Basschatters I used to trade with are no longer here!
My own view is that, once a bass is sold it's sold. It's no longer my property and unless I declared a deliberately below-market price in my sale because [i][b]it's for charidee mate[/b][/i] then what my buyer goes on to sell for is simply not my concern.
Don't get too carried away with the HUGE increase in "value / cost / price" when something sold here turns up at The Gallery or Wunjos or wherever.
If I sell a bass to Bill for £500 and he decides to flip it immediately, then Bill takes it to a shop and says that whatever the shop can sell it for he wants at least £600 back.
The shop also want to make £100 gross profit or there's no point, because they have overheads to meet (staff wages, shop rent & rates, etc.) so that's £700.
But they need some wiggle room to allow for haggling so they list it at £800.
Except that the shop will have to pay VAT on the profit they make (= the value added). Were they to sell for £800 (i.e. the buyer doesn't haggle them down) and then give £600 to Bill, then their profit will be £200, so they actually have to list the bass at £840.
So that's MY £500 bass which suddenly reappears in a shop window listed at £840 - bastards! complete and utter bastards!!!
Erm ... no. Nobody is getting rich here, no one is getting ripped off. And there's no guarantee that the shop will be able to sell that bass this side of Xmas. Chill guys, chill.