How much would this aged eBay account be worth?

13 years old and over 1850 feedbacks all at 100%. Any guess?

Not a dime unless it is a business account which has a legitimate business entity associated with it, that is, one that can be sold or traded. If you try a transfer to another party sooner or later ebay will require some kind of verification which you will be unable to provide and down the tubes you go. Remember we haven't even talked about Paypal yet which would be another barrel of snakes.

if it has 21 days hold its of no use if it doesnt then it can be worth a little

Is it a seller account ?

Please can you elaborate why if eBay account with 21 days hold is of no use ? I just bought one here with mentioned 21 days hold and I have there quite valuable real items for sale. So any insight what is probably going to happen before I mail-out them to winners of auctions will be appreciated. Thanks man