Firm - not soft or yielding when pressed; securely fixed in place.

OBO - Or Best Offer

I for one assume if you you use neither of the words in a post that OBO is implied.
I love to haggle and would never pay someone 100% of an asking price.
That being said... Please put the word FIRM in your posts if you are not willing to haggle a little.

thank you for your time
Ez