[kaev]

I find ridiculous lowball offers more likely when I don't price items, but I often get convos with possible buyers much quicker that way.

With common items people will usually offer something within 20% of the "usual" price, I'll take it or counter offer or stick to / name my price (get annoyed by chisellers when I've already put a low price on something to sell it quickly).

BTW, there is no accurate one-size-fits-all motivation for human behavior or anything close to it. Sellers can be lazy, sellers can put up the items on an auction line and then edit the line later to put prices on it, sellers can be tired of -10% (or whatever) offers. All you wannabe mindreaders above are really shit at it and should give it up.