I would expect to double my money on that, conservatively. This is a (relatively) rare and more importantly, widely-known variety. People's ears perk up when you say, "1878-S Long Nock." Heck, I got $60 for this:
So there ya go...I think the OP's coin has much better eye appeal that Dave's. If the OP doesn't like it, sell it and move on. I would not return it.