How much can I sell my James Avery True Love Waits ring 4?

I am trying to get 80 dollars by this weekend and get 125 before the 15 of July. So I have an old purity ring that I bought from James Avery. James Avery is a great brand, and I looked on Ebay for True Love Waits rings but none are from James Avery. So I don't know if the price would be the same that I would sell mine for. I bought mine for about 60-70 and the ones on ebay sell for about 30 but they have a lot less sterling silver weight to them.