Perform Better plates, Barbell and Landmine attachment being offered for $150 by Michael Newell (Facebook Marketplace, Lakewood). That is 160# of weight, plus a barbell and landmine handle. Conservatively putting the bar and handle at $50, that works out to $0.62 per pound for a reasonable set of bumper plates. Perform Better has premium prices for facility outfitting, but is not a popular brand in the secondary market or a collectable brand in the vintage market.
Do I want to scoop this up and list in the hopes of making $90 (45# pair) + $50 (25# pair) + $50 (barbell) = $190 less $150 cost = $40? The answer is no.