FeaR said:Depends on what you mean by buy a Gamertag.
What payment method are you using ? Rarely will you find someone that's been on site for a while that will take Paypal as a payment option from a new user. The way we see it as you are new so you have nothing to risk etc banned for scamming / Charge backs.
If you are really trying to get a Gamertag invest in a Moneypak and be sure to use a trusted MM.