How much to sell nappies for?

Hey Ladies,
Just a quick question. I have about 2 dozen Bum Genius 3.0 pocket nappies to sell. They're about 18 months old. In alright condition, some have slightly 'fraying' fabric around the elastic of the legs. All need the velcro and leg elastic replaced. Not totally essential but realistically it's required. I have the packets with the replacement velcro tabs and elastic, I just haven't replaced it.

So whomever would buy them would have a stain free pocket nappy, a reguler inner, a half booster, and a packet with replacement velcro and elastic. They'd just have to do some sewing. How much would be reasonable to ask for on Trade Me?

I don't want to rip anyone off but at this point in time we could use all the money we can get so I don't want to sell them too cheaply.

Cheers.