While Welder is never swapping Wurmcoils and Battlespheres in and out of play in affinity it still does far far too much for a one mana card
There are still some doubters, of course, including those that don't rate CGC's credentials as a certified grading company, but that doesn't really matter if the sale is legitimate
To determine a spell's total cost, start with the mana cost (or an alternative cost if another card's effect allows you to pay one instead), add any cost increases (such as kicker), then apply any cost reductions
There are actually a fair number of ways to build reanimate style decks that are more controlling and slower which are arguably some of the best presently
The most valuable Charizard cards are defined by early print history, perfect grades, provenance, and confirmed or widely reported sale records that separate genuine market benchmarks from speculative listings