I've been noticing the auction chat channel being spammed by people selling like 3 cobble stone for like $1, I think it would be better in my opinion to try and enforce a minimum auction value of some kind, encouraging users to sell their 3 cobblestone to the server instead... I don't mean that auctions shouldn't be allowed to start low, just that items sold should be above a certain value or sold in sufficient quantity to make it worth above a certain value, say $150 or similar.

Just a suggestion.
Thanks.