To give some accurate numbers on these account I would need proof you actually own them. The chances of you owning a account with a 200m exp skill and wanting to sell it are very slim. Post a picture of you on this account saying like "This nut from runegear trying to sell this account"
He's not selling it, Spirit, he is asking for a price check. He doesn't need any proof for a price check, nor how can you make the assumption that he can't have an account with 200m xp and be willing to get price check on it (or sell it in your case).