large jars usually do not fetch a high return. the babies sell for $30-$60 and it only takes about a year for them to hit 15-18in.
I was in the market for an adult jar for afew months, I finally was able to get one recently but that was because they are back in season. Its pretty much the same with Black aros.
I would say right now you can get between $100-150 depending how your jar looks and if someone s really in the need for one.
During the summer/fall when they are not in season, you can probably get closer to $200. The most I have seen a jar go for, was $350. But this jar was the best looking one I had ever seen and it was like 25in and 5yrs old