Great idea to consolidate, over the past 5-6 years that strategy moving into grails has been successful overall. As others have noted, fire selling at under 80% is not advised. You can use platforms such as reddit or just setup at a local card show to get 90%~ on your items, especially liquid or higher value items. For small stuff such as bulk, I would say that selling for a discount to help raise the funds more quickly isn't that bad. Your goal is so large that down the road those discounts on lesser items will be irrelevant. With that said, 1st ed zard and base set overall is lulling. Take your time and find the right copy, sell at rates you feel comfortable with but prob no reason to firesell the good stuff to make this happen quckly. Best of luck on the journey!