Eugenia wants to sell her bicycle. She still uses it occasionally and doesn't really need the money, but it is taking up space in her storage unit. She has decided that it is worth keeping unless she can find someone willing to pay $225. Kem, the buyer, would ideally like to purchase a bicycle for $200, and the maximum he can afford is $285.  

Suggest an opening offer for Eugenia and Kem. Once you have determined opening offers for both parties, identify the bargaining zone, target and reservation prices for both parties, and determine whether the bargaining zone is positive or negative. Explain and justify your answer.