@Ding Dong Thanks
Well, all the answers so far were completely off of course
- DA PA CF are completely crap metrics which have 0 impact on the actual strength of the domain. PA/DA are just "toy" metrics. Domains with 1RD and 2000BL sitewide link will have DA over the roof, while some decent RD30+ domains will have crap DA of 8. It's random and unreliable and I advise anyone to take it with a huge reserve.
- Age of the domain is irrelevant, no impact on SEO at all. It's all about the age of the content itself and how long it is in index. The fact that domain was first registered in 1995 will not help you to achieve anything at all.
- Spam -4 - Just lol really

No automated spam tool can tell you if the domain is spammed or not. You have your hands, so use them and see if it's really clean or not.
- Referring IPs 30+ - Aha, so it's okay to have a 200+RD domain with 35 referring IPs? No it's not.

- Backlinks 100+ - Sure, even domain with 1RD can have 100+ backlinks, so again, misleading.
This is better already, but the CF again... if someone wants high CF, I can assure everyone, that he does not really know what he is talking about. Especially sellers who sell high CF domains. That's just... bad. 5 - 200 referring domains is a difference between paying $5 and $500 for the domain.

Good profile and clean history are of course a must have.
And now to OP:
First of all, you should set up a budget for the domain. There's a huge difference if your budget is $10, $100 or $300 per domain. What you should be looking at first is RD and TF. The higher the RD, the more reliable TF is as well. So if you are low on money, then RD 10+ is the very minimum you should go with. TF... well... anything with 10+ is fine, if the backlink profile is good. DA, CF, PA, Spamscore, Moz anal meter and stuff like that can be thrown out of the window. You have hands and head, use them to analyze stuff closely.
Another thing of course are authority backlinks, with those you can go a bit lower on the metrics, but I am not a huge fan of those. Most of the time, Authority sites are overscraped and you have to go reaaally low and I don't like that too much.
Yeh and another thing to consider is niche relevancy. If you want niche relevancy, then you will in most cases be forced to go lower on metrics. Imagine there's a pool of 1 million expired domains worldwide (bullshit but let's imagine). Out of those, 100K have RD10+. Out of that, 50K have additionally TF9+. Out of that, 15K are clean. And out of those 15K, maybe 0.5% is in home improvement. That brings is to 75 domains? I get asked for home improvement domains 5 times a week. So yeh, I think I made my point.
Also, if you are buying from auctions, buy just indexed domains. Especially if you are new and can't analyze the history properly, that will save you a lot of time.