英语翻译
This agreement executed on behalf of the purchaser constitutes an offer to purchase which can only be accepted by the seller by return of at lease one originally accepted copy of agreement to the purchaser on or before 01-10-2009 failing which the offer becomes null and void .If this offer becomes null and void or is validly revoked before acceptance or this agreement is not completed by the purchaser for any valid reason,any deposit tendered with it on behalf of the purchaser shall be returned without penalty or interest
里面主要是说买方还是卖方要退回定金之类的权利？