I hate when people will make up their own prices on things when they text me.
Buyer - Do you have this?
Me - Yes, let me check condition.
B - $50 for those
M - Um, haven't even told you the condition or a price, and they are worth $100 because I just sold three last week for that.
B - OK, that's fine, how about these other things too?
M - $300 for all of it.
B - Sounds good, let me know when they are out.
*a few minutes pass*
B - $250 for that stuff.
At this point I normally just stop responding. I am already giving him a good discount over what I would normally get for the stuff. 
