Replying to I need EBAY help/advice fast

So I just tried to sell my GL1 camcorder on ebay, and it didn't reach the reserve price. Yesterday I recieved a message from the guy who had the highest bid. It said:

$750.00 i am up against a deadline so if you could give me a price that would be great

Today I get this message:
What would be a price that you are willing to sell the gl1 for and i am very urgent that i get a reply i would like to purchase the camera as i won it but did not reach the resrv price so i am serious but i am against a deadline to get the camera please respond


thansk

Now I'm ready to sell this camcorder, and I want to "accept" this guy's offer, or at least talk to him and see if he's legit. Thing is, when I try and respond to his message I get an alert that says:

Attention!

We have determined you are trying to contact an eBay member with whom you are not currently involved in an open transaction. For the protection of the eBay community, we sometimes block these types of communication.


FUCK. I just want to talk to this guy and ebay won't let me. Does anyone have any suggestions? If I don't act quick I might lose this offer. I tried sending him a message on my dad's account and it said the same thing.

The only way I could send him a message (that I know of) would be to send him a second chance offer, but if I did that then he could just buy the camcorder and I'd lose money (since he offered me a lot more). PLEASE, I need your help Newschoolers. I know you can do this.