Need advice with maxed GIM pricing

Hey, so I got this blue helm maxed GIM, all of the other group members are my irl friends and their accounts can be sold too if wanted. I'm the original owner and also the group leader with this account. Account is NOT jagex launcher account. Has most of the clue rewards stored in house (couple of gilded items and such)
Just asking around for the price these goes for, as I might be selling it.

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Gyazo + Gyazo +

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If I was thinking of buying it id say about $2100 or so.