What is " lowball"

Buy low sell high!!

Life is too short to get all worked up about this.  If someone makes an offer that is below what you will accept, all you need to do is reject it.  If you do so politely, you may find they come back with an offer you find acceptable.  That's exactly what happened to me, when I sold my SACD player.

I've had my own consulting business now for over 18 years and after I've gone back and forth for some potential gigs, I get this "one sided" contract offered for my autograph, instead of getting my undies in a bunch, just let them know that they'll need to strike that language, or I won't accept the contract...on a number of occasions have turned down work, because I don't want to deal with people like that.

Move on to the next one!

Something similar to low-blow in boxing :-)

Good points mentioned about the values. Sometimes sellers have no idea or just being ignorant and want to get high dollar for item ain't worth a dime. 

Once I've seen dood sellin' White Album with 6-digit black serial number -- Apple label in average condition for $495. I didn't offer him $5 for his, but instead I offered him to purchase mine with embossed 5-digit serial number with above average condition $40 (also Apple label) so he can resell mine for $4,000. He replied -- "I gutta sell mayne furst". If he offered me $15...20, I would sell which would be more than 50% off asking price.

Another retail store strategies is to price product almost twice as much it should be worth and than take 50% off.

So still don't know if I'm low-baller or not. I'm just retailer.