The name brands you get about what you paid for them in most cases.
That really depends. If you buy a New Holland Boomer, rather than the identical LS, you get to pay a bunch more, for the same machine. My LS would have cost over $8K more if it said NH on the side. $22K versus $30K for the same machine???? NH dealers have even said they would do warranty work on an LS if it was approved by LS, and the parts are the same (aside from the headlights and grill), so you have the same support backing you up as far as parts availability over time as if you bought a NH.
In reality, none of the big names other than Kubota are building their own machines until you get into truly large Ag machines, so there's a risk with any of them that the supplier might disappear, making parts availability difficult. With LS being owned by one of the largest companies in the world (LG), it's a pretty safe bet they aren't going anywhere.
Even further, when a tractor has a common engine and transmission, like the LS does, it means parts will be available for decades. Most of the other parts aren't particularly unique to any brand if they break....a hydraulic cylinder is a hydraulic cylinder, etc, etc. The whole "parts availability" issue is far overblown.
When you look at Kioti, the reality is they're making a lot of tractors for a lot of companies, and they're another one that isn't going anywhere.
The resale value issue is also overblown. We're not seeing LS, Kioti, or Mahindra tractors that are a couple of years old, being sold at a fraction of their original cost. One, they're all good machines, so people tend to keep them. Two, they start out at a lower price, so the typical depreciation is relative, and good ones get snapped up pretty quickly, but not at ridiculously low prices.