Possible buff suggestion for Your Store deals?

I posted this on Reddit to test the waters, but enough people liked the idea to have me consider posting here, where hopefully it will get some attention. The gist of it is, after the player reveals his or her six deals for the event in question (e.g. the Lunar Revel) they can then buy one of the deals to get a free 're-roll' for use on any of the others. This would allow them to make use of the offer Riot has made for a skin, and potentially take an unwanted deal, one they'll never consider since they would be passing it on, and trading it for a new one they might like.

It doesn't seem too much of a stretch, to me, and there are easy ways to keep it in the black, for Riot. Say, by limiting the new role to the same champion as the previous one, the same skin tier, the same percentage off, or some combination of these. And since the trade here is an unused deal for even a chance at a fresh one that would consume RP, I think Riot would benefit. And this would also make the 20% and 30% off deals more attractive to players such as myself, who otherwise have no trouble waiting on that half off sale down the line.

Thoughts?