I buy a lot of older pressings, most of the high ticket ones are ok, but some aren't. I "invested" in a Furutech DF-2 flattener (Orb) a decade or so ago. Well worth it to me, though I can see how some people would regard it as an extravagance. Yes, if you got a new record from Amazon, easily returned.
I bought a sound track from them quite a while ago-- around $40-- arrived from EU very warped. It took quite a few attempts to flatten, starting with the Vinyl Flat (a relatively inexpensive, "manually operated" flattening system) and got it playable with the DF-2. You may ask, wait, why not return to Amazon? It was out of print and the price skyrocketed pretty quickly to $400 for a copy (of uncertain warp condition).
A lot of what I collected in the past 10 years was from the seventies- a real low point for vinyl quality, especially in the US.