While some cards fluctuated in value over the past week, there are some cards that really shot up in price and most retained value
Goldvein Pick is my first choice of the two, given it has the lower equip cost, but either (or even both) might be right for your deck
Oloro, Ageless Ascetic The second-ever Commander precons featured Oloro, Ageless Ascetic as one of the face commanders
It typically means that a new set has come along that opens up a whole new way to play with an older card
It will also likely get you the citys blessing within a single turn cycle if you played it on curve, giving your artifact creatures +2/+2
(In fact this misconception is so prevalent that nearly all the videos I could find on mash shuffling included a mention of it.) Unfortunately, this is not accurate