I hardly sell anything large so it's hard to know what's reasonable. Could anyone give me an honest opinion on what a 8"x8" green Birdsnest would go for? Online prices seem expensive and knowing this stuff grows pretty fast I can't see being worth that much.
I think I saw one this size last year that was being sold locally for $120.00 / if I recall correctly?
If it is attached to the rockwork these often become many "colonies" when you go to remove them from where they are at. Best bet may be to take it to your LFS and see if they will give you credit or trade for something else.