Could be too late... but if we do sell one, who would it be?
Obviously Aubameyang is giving us more output right now, but he's older, and pace is a big part of his game. Will he still be effective when that goes?
If I was being ruthlessly business-like, I'd say sell Auba, keep Laca. He is younger and still has upside, particularly with a fresh management team who will hopefully reinvigorate him. His output is good anyway, if not at Auba's level.
In terms of selling one of them last off-season, that was never feasible at all unfortunately, even if it looks that way with hindsight now. Martinelli was completely unknown, we could never have gone into the season with just one known striker. We all would've screamed bloody murder. What if we had sold Auba, remembering that Laca got injured straight away at the start of the season? We would've either been starting Martinelli, or playing someone out of position. We also had the added complication of being short on wide forwards, with us signing Pepe near the end of the window. Just never could've happened.