Press Play Cards

First time for me. Kinda blew up on someone on the phone at the shop today. We sold 8 UPCs, 12 figure collections, 6 ditto collections and a bunch of delta for MSRP with the seals ripped today. Later in the day after everything is sold out (and a bunch of people already calling asking to either sell their upcs which we aren't buying or asking if we had anything left) 1 person called with such attitude heres how that conversation went: Us: press play cards how can we help you Him: I have a 30th night UPC for sale Co worker then hands me the phone because I deal with that type of stuff especially on release Me: hey what are you selling? Him: I got a 30th upc umbreon and want to sell whats your offer Me: it just came out we dont usually buy it this early but how much are you looking to get? Him: markets $420 whats the best you can do Me: well markets $420 release was 2 days ago and we sold ours for $200 each this morning I dont want it. Then I hang up on his face. Never have I ever done that before but damn people have gotten BOLD and need to learn some damn manners. Like I've heard/seen people complain about scalpers/vendors and the way they handle themselves and talk but idk today I just wasnt having it.