Sometimes whenever I want to sell something that is not very popular on the market or it has a very high price I use the L/O (leave Offer) to not make the buyer scared of my prices.
Whenever selling a Drake Card, for sure I want to get the max I can, so I can't put A/S 3.5b coz buyers will become scared of my price, but If they offer 2.8-3b I would accept. So its better to "call" the buyer first and after that saying the price you want.
It works good with that Temporal Boots in which is not the best builded ones, like Temp STR AD4/SoL, Temp Dex EA4/RM, you don't put a price because people will always judge your item before offering into it, so you call the buyer and speak to him the "usefullness" of your item and which price you would consider.
But it really pieces me off when somebody is on L/O and you ask the price (coz your not sure how much to offer) and the seller say "Only answer the offers", this is like ~SERIOUSLY~ ?
Asking for offers its not that bad, the problem is when people don't say the price coz they are always expecting something more than a fair deal.
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When I got my +12 HF EA9 I was talking to the guy all the days, just looking for his price at the first day he asked my 1.8b on the HF which was a lot expensive, after some days hw asked me 1b, I guess because he got a lot of PMs and were not selling his item coz he was just searching for a fair price, but at least, he answered me with his pretention.
Hope I get understood by you guys xD