Appraise this 2 letter Gamertag

Playing with a guy on Xbox with the gamertag:

K8

How much is this worth?
Trying to buy it off him

Alot is all i can say. Im not sure how much a 2letter/char costs without a space but spaced ones are like 300ish

He also owns K9, his parents are Microsoft affiliates/ staff or something related to that, I forget the username but my old friend was IRL friends with him and wouldn't give it to him because it would be resold.
That being said, on the 11 year it's on right now ~ 1,100-1,250$
Itself ~ 850$+
All depends on the money people have, tags have really changed over the past year, can't imagine the prices back in 2010 and before.

I don't think he is willing to sell it.
Well over $350. It's a good gt.

1.Account name:K8
What I think it is worth: 800
Why I think this: Insane market for these and an insane interest of these accounts without the space. People go crazy over two letters in lobbies and they have a very large amount of attention.
What this account can go for in this market: 1,000
Tips to sell this for more than it is worth:Well it is a name Kate, it is 2 letters long which is crazy for anyone, I don't know what else to say for this. The demand for these is ridiculous.

Yours truly,
Loyal Appraising