I recently scored some first U.S. press editions of Mercyful Fate & King Diamond vinyls at my local record shop. I know I overpayed though

Thing is, it's not every day I can have the convenience of a 5 minute drive and just buy the vinyl then quickly go home and play it on my turntable. It's a little embarrassing what I paid but here goes:
Mercyful Fate - Don't Break the OathFirst U.S. press by Combat Records (1984): $39.99
King Diamond - AbigailRoadracer Records, first press (1987): $29.99
King Diamond - ConspiracyRoadracer Records, first press (1989)(Includes Thomas Holm drawing insert): $32.99
Last year I scored "Melissa" and "Them" for $19.99 each which I felt was good. "Them" is the first U.S. press by Roadrunner Records in 1988 and "Melissa" is the second U.S. press by Megaforce Records in 1983 but it doesn't have the insert

All in all, despite overpaying a bit I'm still happy because I love King Diamond & Mercyful fate and am able to own a piece of heavy metal history.

Like I said before, I feel as if part of the price was for convenience. Problem is vinyl is popular and trendy these days so record shops and online sellers seem to take advantage of that.