Went to Pike Place Market yesterday and saw a booth selling leather wallets.  The vendor was eating a snack and there weren’t any other customers.  I picked up a decent looking leather wallet and started a onversation:

Me: How much is it?

Vendor: $29.  It’s on the price tag.

Me:  Ah here it is.  Ouch… too expensive.  I’ll give you $10.

Vendor: [Seems a bit taken back] No!!! [in a hurt tone]

Me: [Thinking to myself, Crap, she's either taking it personally or really a good actor]  Too expensive for me then.  [Begin to walk away]

Vendor: How Rude!!!

Me: [Controlling an urge to laugh in her face]

Ok here’s a lesson to street vendors everywhere.  When a customer offers a low ball bid, don’t become insulted and get on a moral high horse.  Instead leave the room open for negotiation.