Hi thanks for everyone who answered my survey, it really helps me to think about all of this.
So i'm gonna end up with a system and try to satisfy everyone. Just hope it's not gonna be too complicate xD.

So first of all NEXT adopts will started as >>> Auction.
But instead of be 24 hours after last bid, it'll be >>> 48 hours after be posted.
After 48 hours the auction end the post will become >>> Fix price sell

The adopts already posted are fix price. (before the date this journal is posted)

AB1 will change from 75$ to 60$
AB2 will change from 120$ to 150$
AB3 will be deleted

SB value may change depending if the base was edited or not.

Also there will be no bonus features related to the AB but to the additionnal value add on the SB (Starting bid).
It'll be same system as a fix price during the auction.

In the end of the auction (IF there is a bidder during the time) the value on top of the SB will be used to get additional features (it's like the fix price system)

Exemple:
SB: 20$
Winner bidder: 35$
So additionnal value put is 15$ which can be used to add wings, add horns. Or add piercings/accessories, or getting nsfw.
(You can ask multiple time a same add-ons)

The value is here

+10$ custom NSFW
+15 focus parts (butt + Eye + Feet + Mouth)
+25$ full backview
+5$ piercings
+10$ jewels or accessories
+20$ underwear
+50$ outfit
+5 tattoo
+10 add wing
+5 add horns
+15 Breast change
+30$ edit body (thin/musclar | shorter/longer | etc)
+20$ edit 1 color or 1 element color


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!!!! Of course fix price ALSO have access to those add-ons. !!!!
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During the time i edit all the adopts you can just sent me a note with the adopts you want to buy.
Thank you.