PM me if interested. Like I said, I'll take payment in Microsoft Points, so 5600 would be $70 in case you were wondering. Just message me a code for 4000 and 1600, I'll put them into Xbox.com to see if they're valid and I'll reply to you with my Steam login.
Thank you.
Also, correction on the title. The total pricing of my Steam account is $475.65 USD as checked on Steam Calculator.