Underwood Hifi Cables

You had better be sure. Resale will be at a huge loss for off brand cables of any type regardless of how "good" (an opinion), they may be. Personally, I would stick with tried and true well reviewed/liked cables that can be flipped easily if they disagree with your system and personal preferences.  Good luck in your search 🍀.

I started out buying one Diamond Extreme, their top power cord, from Underwood and now have three in my system. I can highly recommend their top power cord. They beat out in my system Audio Sensibilty Signature V2 power cords and a Triode Wire Labs Obsession power cord.  Both Audio Sensibilty and TWL are  well reguarded cable companies   My recommendation would be to buy whatever power cord from Underwood you can afford and expect to receive a great performer and quite a bargain.

Cables are like tennis shoes.
You kind of have to try them on to see which ones fit best.
I don't think there is any way to tell which ones are going to work best in your system any other way.

There is a huge market for used cables, and it works both ways. You can get some excellent deals if you're a buyer, but if you seller, you're going to take a hit.

With the amount I am buying I am getting what I consider a very substantial discount. Gonna do 2 pairs of xlrs since at some point I’m sure i will add dac and tube pre. 
Think I might give it a go. I’ll let y’all know what the outcome is. 
Not a real easy way to just try out cables. Yeah they have the cable store but you are in 10% for every one you try. At least that’s the way I read it. If you are looking at pricey ones that gets to be a lot of money real quick.