Buying a GW CD Key

Hi all,
I saw someone today who was advertising a GW account (CD Key) for (150k)and was wondering if any of you have purchased an account like this?
What would be the problem or the advantages?
I was just going to buy another GW from my local retailer. so I can have more than just the 4 slots.

Thanks in advance for your replies.

GLiDeR
aka;
Mee Healyu - M/Wa
Miss Believer - W/Mo
Mee Strike Yu - M/Me
Lord GLiDeR - N/Me

I found an answer I'm satisfied with...thanks anyway!

http://www.guildwarsguru.com/forum/s...g+GW+accoun t