Need help determining value of opalescent glass

I have, what I believe to be, a blue opalescent Northwood sugar bowl with lid and spooner set, bearing the carnelian pattern or Everglades, as some are calling it nowadays. I bought this set at a garage sale and was told that it was appraised 30 years ago at $750. Of course, I know this is NOT the case now, as the price of glass, along with everything else, has gone down substantially. I would just like to know if anyone has any idea how much it is actually worth in today's market. All of the research I've done online and at the local library has brought me to the conclusion that this particular set was produced around 1903.