Buyers replying to Make an offer

[fixercraig]

Ive had 2 bad experiences with "make an offer"  Id like Ebay to explain to me this.  How come when i make an offer (as a buyer) i get a big popup.  The popup says your are entering a binding sale or whatever  bla bla -   if the seller accepts your offer.  Yep i know that.  How come the seller is not obligated to reply at all???  I waited the 48 hours - no reply - not yes - not no - not NOTHING.  It timed out.  In the meantime i missed my planB if seller didnt accept my offer cause someone else bought it.  So why am i legaly obligated to buy - yet seller isn't even obligated to even friggin respond???  I called Ebay - they fluffed me off.  That was the day i discovered Amazon.

Other one - seller has the make an offer option.  I offered within 5% of his asking price.  Seller replied no.  Not even a counter offer.  Nothing - no.  So why does Ebay even have this friggin thing??  I never bought it in the end for spite. 

[marnotom!]

Not trying to be snarky, but if you knew the seller had up to 48 hours to respond to your offer, why didn’t your Plan A take this into consideration?