Board Thread:Bazaar/@comment-70.72.54.246-20150610044511/@comment-26243141-20150610050817

My advice would be try to measure them back to pots value. For example, one could say that Avi+2 is worth 120~150 pots, and Nergal base (*6) is around 120~140 pots too. So a trade between the 2 of them (or with Nergal side adding 10~20 pots), is considered a "fair" trade.

Grainne and Mona is roughly the same price, so it may work (considering they're both same in skills chance to proc and comes from the same LE packs in same event).

Another to consider is the amount of "Free units" with the same element/attack typing. Recently we had much of free Slice Earth units (Caravia, Ywain *6, Haniel, and next event's Viktoria), so maybe they'll go down in price a bit. But aside from that, I use the "pots measuring" trick and get on with it.