0.05 btc I think is the best reverse price you going to get
I'd pay 0.05 for a full member account.
0.04999999 BTC can be another perfect price ! I would buy legendary for 0.1 BTC though.
I might not understand the concept of a reverse auction - does every offer have to be lower even if someone offer a better product...?
I can get you a senior account for 0.5btc: It's close to be an Hero with activity +400, no negative trust, no spam posts, registered early 2014 with more than 750 posts. Also, the account have been rather inactive the last months.
reverse auction is not a good idea since the accounts may have different activity so their value if different
like if account #1 has only 126 activity and 130 posts and account #2 has 238 activity and 400+ posts then account #2 is more valueable then account #1, but both are full members, then how reverse auction can work in such cases.
Reverse auction is bad because there is a huge difference between seniors and full members, related to price and signature space. Seniors cost more than double of the price of full members.
Maybe if he put some rule regarding to price by activity, and other bonuses related to post quality, etc, and then he would pick the account with the best score/price ratio, would be fair, but this way he'll only get a just-promoted full member that has most of his posts in of topic and games and ratio and might have already been banned.
