i highly doubt anyone who has mass amounts of gil saved up will need to pay for wins, unless they literally have no skill at all, linkshell that doesn't run kills, or restricted playtime, in the current stage of the game i think its going to be unlikely that many will buy wins, especially at the price posted :/ but good luck at any rate lol :)
Our ls has prices similar to that and it's pretty rare there isn't someone wanting to buy a KI, even this far into delve. 10-15-20M really isn't all that much, considering you're likely getting best tier weapons that people have paid 150M+ for in the past. A good majority of the shouts here are either completely fail, or are only looking for mage type jobs, or are jp only