eldlich cards yugioh CR02-AE190 the Mad Golden Lord (R) Features the highly sought YGOrganization | [DBSS] The Riches

This could really take the legs out from underneath any combat reliant decks on the table

JPN Heat Wave Arena cards carry a 15-40% price premium over their ENG Destined Rivals counterparts, with the premium being largest on SAR cards

So which ones are worth the most

Tezzeret, Master of the Bridge You could take any Tezzeret card, replace all the instance of artifact with dragon and come up with a completely functional Sarkhan card instead

Registeel EX #99 (Pokemon Hidden Legends | Pokemon Cards) prices are based on the historic sales

It is a good idea to read up on the meta decks at the time as well and get a feel for what you are likely to be playing against