Android :: Regarding Buying Eris From 3rd Party

I found a good deal for a HTC Droid Eris online from a website, the location was perfect as it was right near where i reside. After setting up an appointment to meet and looking at the phone i found that the phone wasn't 'brand new' but had been used, the owner claims that she bought it from another person who claims that it had not been activated at all. I tried to activate the phone and couldnt because the phone had already been activated on Verizon's Network. She said that she was going to take the phone in in the morning and see what they could do about it. So she is going to give me a call tomorrow (i guess its today now that it is past midnight).So my question is if she calls me back tomorrow and says that Verizon has taken care of the problem and i can now activate it with my phone # do i go ahead and buy it from her? Is there anything i should be worried or be informed about? Help me out fellow Android users! I dont want to buy the phone and activate it and get screwed over somehow because i wasn't knowledgable to a certain extent, as you can tell i dont have much experience with phones as far as activation/ESN/plans/etc whatnot go.