whilst this may sound like a good idea to turn the marketplace into a buyers market, instead of a sellers market, i can immedeately see a number of flaws.
1. it will not change the prices.
rather than the current "i sell at 100k" it will become "i will not sell to anyone offering less than 100k".
2. there will be page after page after page of minimum bid unaccepted.
why should someone sell for the minimum price when they can just sit on their fsp and wait for a higher price to be offered?
3. there is no "instant buy" capability.
if you want fsp *right now*, say for an auctionhouse bid or some stamina for hunting an se, there is no way to 'cash in' and buy fsp immedeately.
4. the requirement for gold.....
right now, say i have 400k in my bank. i can withdraw it and buy fsp with it immedeately, without having to hold it for very long and without having to wait until someone bothers to check the market to see if they want to sell.
5. if there is no cap, prices will rise.
regardless of what level you set the cap, prices will *always* rise to the cap, such is the nature of capitalism.
6. close the marketplace and watch the shoutbox go!
the second you close the marketplace, the shoutbox will become full of "i sell at X price" fsp sellers. it will not stop the market, just move it to a new place.
7. closing a free market drives it underground.
do not close the marketplace, it will create an unregulated "underground" marketplace with no accountability, just as the buffs market is at the moment. (by "underground", i mean "run by players, not by game, just like buffs. there is no support for buff sellers in game, you effectively have to just dive in and take any "buff stealers" on the chin, if you dont get paid, you have no recourse)
considering that a few weeks ago, prices on the marketplace were as low as 90k and there were often 5 or 6 pages of offers, what happenned?
simple. from what i understand, a high level player effectively bought out every fsp on the marketplace, emptying it of all offers.
that right there is the root cause of the problem. a healthy on-going market can be bought out by a single player, leaving it in an incredibly unstable state. fsp are simply too rare to allow supply to dry up, the demand is too high. as soon as fsp become unavailable, the people who cannot contribute or complete offers begin to complain because they cannot buy fsp at all.
to put it simply, rather than changing the way the system works, since it was working very well a few weeks ago until it was so massively disrupted, the 'better' solution is to use that effort into finding ways to increase the number of fsp available in the game (e.g. the way you have tweaked the lottery to be a gold-fsp exchanger).
as far as i am aware, the current need within fallensword is to reduce gold and increase fsp expenditure. this is obvious when you see that players have the ability to simply "buy up" an entire market and still have gold left over to do it again whenever they like, and *still* do not have enough fsp for whatever they want to buy.
so, the question arises.... what to do with all that gold, how to sink it and how to increase the supply of fsp......
obviously it's up to the game devs to decide ultimately, by all means, try the two side-by-side, but do you really think someone is going to accept an offer of 50k when they know they can sell for 100k?
given the current in-game need for gold/fsp exchange and fsp input, closing or changing the marketplace is only going to make things worse, much worse.
understandably, i voted no.
I am happy to see a lower-level player who can
1. Finally understand that this won't mean a price-cut on FSP's,
2. Realises so many effects which however should be seen by many more people
3. Can FINALLY express his/her thoughts in more than a single sentence of "Yes wonderful idea!!!" "I likey itz!!!".
I agree with you.

Edit: Only exception is the prices. They'll rise.