I've been consolidating my Splinterlands collection recently, selling off some lower levelled inferior cards and buying back better quality cards.
The general plan is to swap, for example, 30 BCX worth of varied rare untatmed cards for 30 BCX of ONE rare untamed card, and make sure that 30 BCX is on top of another 85 I've already got , so I could max that if required.
However, it's still a hassle listing, I find I've got to use BOTH Peakmonsters and the Splinterlands front end to double check I'm putting the cards on at a decent price!
This video outlines the hassles.
▶️ 3Speak