User blog:Samed5/Help, I need somebody.. (Terrible pun)

So, my sister and I want to buy a signed Beatles record for my mom's 50th birthday, since she is a Beatles fan. We found a reasonably cheap one (999$) on ebay, that was signed by Paul McCartney.

My sister and I did not know if the signature was real or not, so we did some research. My sister made an offer for 850$, but was not aware that when an offer gets accepted, the item is yours.

So, I'm wondering if any of you know if this signature is real or forged. Thank you very much for any help.