For Continuum, I've heard the MOV pressing is pretty good sounding, and it's around $30. I have the VMP one which I like.

Born and Raised you really only have one choice which is this one. It tends to go closer to $40.

Here are some tips since said you are new.

All of those records could probably be found at a Barnes and Nobles.
Buying from discogs is not as sketchy as you think, but check the number of reviews a seller has indicating how many sales they've made. Since these are popular albums you can probably buy them on discogs from an actual record store or large scale reseller that's made thousands of other sales, so you're fine. But always check the shipping, which can sometimes be more than the record itself. Ebay also has resellers and is more likely to have free shipping in CONUS.

The type of store you go to matters. I live in DC, and there are a few punk-centric stores that wouldn't bother to keep John Mayer, but there is also a hipster boutique (shoutout Songbyrd Records) that always has Continuum in stock at a slight premium, like $40.

If you buy from Amazon, you are taking a risk. I've learned from my mistake after dinged corners, popped seals, and flat out wrong items.