Those kits have a lot of crap you likely don't need for rifle reloading. What you need (other than the brass, bullets, primers, lube, tumbler media and powder of your choice):
A good comprehensive reloading manual - Lyman, Lee, or some other manual NOT published by a bullet maker. Most bullet-makers' data is online anyway, but there is really really good information about hand loading in those manuals. Read the front sections well. The rest of the book is load data charts.
A single stage press. They're inexpensive and they'll last forever. A used RCBS Rockchucker or similar would be where I'd start. Avoid progressive, semi-progressive, etc presses. If you're loading for 2 rifle calibres, you'll be happy with the single stage press.
Your 270WSM and 308WIN dies - I like RCBS, but honestly, one is just as good as another unless you're getting into competitive shooting. Get FL 2-die sets and learn how to use them to only bump the shoulders back a couple thou. Your brass will last longer.
A cheap vibratory tumbler - I like the Lyman, but again, one is just as good as another. You can start out by cleaning them by hand, but I wouldn't.
A powder measure/dispenser, or a set of Lee dippers - unless I'm loading more than 25 rounds, I don't bother with the powder thrower. The dippers and the trickler work just fine. I would recommend you get a powder measure though. I like my Forster one and my Lyman. They'll all work for you though.
A trickler
A scale - Here's where you don't want to pinch pennies. You don't need to spend a fortune either, but really avoid the cheap crap. I'd recommend a Dillon balance beam scale. Electronic scales are good too, but in order to get a good one, you've got to spend some money. A balance beam has no electronics to fail on you, calibration takes 2 seconds, and they're more accurate. The Dillon is made by Ohaus. You can get Ohaus scales on Amazon too. The older RCBS scales are good, the Lee one is garbage, not sure about Hornady or Lyman.
A hand primer, unless you want to use the one built into the press - most people use hand primers. The Lee hand primeer actually works really well, but it uses special shell holders. An RCBS, for example, uses the same shell holders that the press uses - this is the way I'd go.
Calipers
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You'll pick up extras as you go (bullet pullers, headspace gauges, caliber-specific funnels, etc.)
Add all that up and you're nowhere near the prices you've quoted. Most of this stuff is easily found on EE for half the price of retail. - On thing about used gear - I'd never buy a used electronic scale, and I'd never buy a used powder measure - other than that, same your money for primers, powder and bullets - which cost a fortune.
Good luck and be safe.