Well in domaining in general, I dont think you can call out someone as a low baller. You price a domain at X price and a buyer is well within his rights to place his offer. Its finally up to you as a seller whether you accept the offer or not. If you do not want offers below a price, you can very well make a note in the sale thread - no offers below X$. So buyer is aware of it. There are no fixed prices that if your domain is say 4 letters it will definitely get you a fixed amount. If it was a stock market and you had a stock, yes, you could say the listed price is this and I want X for the stock. But in domaining nothing like that. Like I may feel that the domain I have is worth 1000 or even 10000 but till it does not sell and there is no offer value = 0. When I get an offer for the domain I simply study the offer and say that my expectation for the domain is around Y and if we can meet somewhere a deal may even happen. Say the buyer says $30 / domain you can always counter and say you want say $100 or whatever price you want or that domain, and may be the buyer can meet you at a higher price. This is also a forum / marketplace where most of us are just resellers/investors hoping to get a price. Say I may think that a 4L .com will get me $100 or $150 one day so I would be ready to take a risk at say $60 - $80 etc depending the amount of risk I am willing to take. Its a simple case of demand/supply and an assumption of what I may get for a domain. Say if tomorrow the market for 4L tanks and if rates go to $50 a domain? Personally I have not invested in a single 4L domain as I dont understand the market of random 4 letters unless the 4 letter mean something!
