When I started on Listia at least a couple of years ago, credits were I believe worth about $1= 1000 credits, and they were fairly stable for quite a while. I really haven't followed it very closely recently, but I believe the inflation started about a year ago and now is just out of control. I just checked the going rate on 5/10/16, they are now going for $1=9100 credits. So my approx. ******* credits instead of being worth about $25 are now worth approx. $2.75.
Management does not seem to care and just keeps on issuing more credits in different ways, so I see no end in site for this hyperinflation.
I got stuck with my credits, I bought some to purchase something, won the item. Seller did not ship or respond to me. Although at the time Listia refunded for some of my purchased credits I had to keep some. They will not refund anymore for purchased credits even if sellers don't complete sale.
Stay far away, very far away unless you plan on using your credits very quickly.