"Suggestion: Item upgrade/downgrade in shop"

#PokemonGO: I've been thinking for a long time that it would be really nice to trade certain items for alternate items within the shop (or wherever), as long as it is set up to prevent abuse.Examples: Trade __ Ultra balls to downgrade to __ pokeballs Trade __ raid passes for __ incubatorsI'm not gonna bother with calculating ratios I'd use, because Niantic will do their own if they like the idea. I thought of this because I'm almost always swimming in one or two items while majorly lacking in another. via /r/pokemongo http://bit.ly/2VO97F2