Dumb Mistake by REO agent and I - Please help

[Greg P.]

Hello, I'm currently in escrow to buy a property through a REO agent I contacted directly. He was more than willing to help, and we signed the paperwork quickly. Well, come to find out, his assistant accidentally checked the buyer assumes special assessments box and I totally missed it because he and I were such in a rush to get the paperwork filled out. He didn't even explain anything to me because there were literally 100 initials I had to sign so we zipped through it. Well, it's 2 days before closing and the sellers title company is asking me to pay $4k more because there was a pending assessment on the property. I know I shouldn't have signed, but I assumed everything was fine because I've bought numerous reo's with no problems? He even admitted it was a mistake, but he's not sure what to do. Any suggestions?