The only bit of evidence required is this PDF from HP official site: http://h10032.www1.hp.com/ctg/Manual/c02972516.pdf
As u can see, 32GB is the highest capacity they offer with this model.
My father also has a senior post in HP in england, i can ask him if required, he would as someone from his team to run a check on their product database to confirm this.
Bro, look, we're not trying to pick on you, but that much space for 3500 is a bit too good to be true, and you know what they say, if its too good to be true, then it usually is.
Too many people promise money-back guarantee but I'm afraid in Pakistan, the only guarantee is the level of Imaan that person has in him, and I'm afraid most people in Pakistan lack this (I'm not saying that you do but most defo do).
Over ebay, and indeed many other online stores, payments are made usually over PayPal. They serve to resolve any issues should they arise and they even give instant compensation of up to ?500, and the rest they deal directly with the seller of the item, and trust me, you do not want paypal on your case since they use unforgiving debt collecting services. If you don't pay them, then your credit history is tarnished forever over a one-time transaction and in future NO bank will lend you money and so many other consequences. In short, in Pakistan, there is no liability, and therefore no one feels obliged to do the right thing so it's pretty difficult to believe someone that you'd be blindly paying over the internet!