These are all factors that will affect your cards grade
Electromagnetic Interference: Try to avoid standing near wireless devices, computers, TVs, and other machinery that emits RF noise whenever possible, as they can also be an issue when trying to get a clear signal
Learn to negotiate Pretty much everything in life negotiable, and this includes collections which are "priced fairly/firm/whatever." While in my ideal world the seller would always ask a price that I feel comfortable paying, this isn't always (or even usually) the case
In addition, you can also activate this [When Digivolving] Effect in response to opponent Digimon being played, keeping the opponent Digimon played in check
He had stored it in two ways: the best specimens were preserved in binders, while others remained unsorted in a tin
(Quick Effect): You can banish this card, then target 1 monster your opponent controls