There's a clan chat full of people trading these, I don't recall what it is but that's where most people go to buy/sell their hats/crackers
Don't have an RS account/havent had one or logged on since like 2006 xd. Except for like 1 week in 2011.
I don't know current prices, but when I traded gold, I always preferred shards to items. Prices of shards are fixed whereas the uncertain prices of rares is another annoying variable that needs to be negotiated. Whenever I did large trades, they were always in one go.
Price ranges: Blue: 3.7-3.85 Purp: 1330s Yellow: 1435s Green: 1615s Red: 1835b White: 2250-2325 Cracker: 6.5-7.5 s= instant sell in GE b= instant buy in GE
If I were you, I would try to dump it all at once for a slightly cheaper price. RWT bans are extremely high at the moment.