Just going over a lot of different bots. it helps when big bot chains such as Goatbots, Mtgotraders, Cardhoarder have good price because they also have a lot of copies in stock and allow multiple buys.

It also happens often that I just spread my purchase on several days, or more like for some here.

Especially for non Standard cards, copies available right after I bought a few playsets may be higher, but stocks will replenish. To be faire and accurate, if you look at all my purchases there is also a few times where prices get better after I buy my copies so it is easily possible to make better deals than I do, maybe about 50% of the time.

I’m still planing on writing a comprehensive guide for buying/selling cards on MTGO from a speculative perspective (which could also be applied for players that want just 1 playset and want the cheapest cards).