The problem with some of these low-tiers is that they only seem to sell to buy orders. Since suggestions are to reflect a common trading point, they will move closer to buyer's value the more people sell these hats to said buy orders. In most cases, buyers and sellers end up being only a few ref apart, mostly indicating that people struggle to sell at even the smallest of profit margins.

As an example of the above; one of the sellers from the suggestion here tried to sell for 13 with no luck for two weeks, then lowered to 12 for a while and then went inactive, and ended up dumping it. This typically happens on hats that don't really sell aside from buy orders.

Since there's actually a gap between buyers and sellers, I can give this some time to see if higher sellers manage, and if they do, the range can be widened, but if nothing else happens, then it appears that selling to buyers is the common trading style for these.