> This area i'm not to sure about. Does a contract
> have to be a signed document between the two 
> parties?  What about verbal agreements?  Does 
> that make them invalid?  The snag with verbal 
> agreements is that there is no evidence so it's 
> hard to prove it even existed.  But aren't mails 
> are written/typed contracts?   

Yes there can be verbal contract. But a 
confirmation of command is not a contract at all.
You would need a "sale promise" (dunno the extact 
term in english) which is a formal binding 
contract. It can't be writen just in anyway
but have to follow some strict rules. Usualy
such a contract involve clauses about what happen 
if one of the party break it. (and that apply to 
both party : seller and buyer. So a buyer can't 
cancel the sale just like that).

Before the paiement is received by the seller,
you can't even say that there is a transaction...

In some extrem cases and with a very good lawyers 
you may be able to sue if the sale was canceled on 
the ground of some kind of discrimination. (and 
no, "I don't like you" is not a discrimination).

> If i offended you as a seller Yann,

Not as a seller : as a non-american who
think that lawsuit should be reserved for serious
matters and shouldn't be doable for any silly
pretext.

Cheers,
Yann Stettler