I just got all the parts for this. It was about $50 for the pi4 4gb and about $50 for the SSD.

https://www.amazon.com/ADATA-SU635-3D-NAND-Internal-ASU635SS-480GQ-R/dp/B07PGC3JKQ/ref=sr_1_3?keywords=480gb+ssd&qid=1572304412&sr=8-3

Your post has been deleted but I saw another post of yours that said your budget is $1500. A good first step is to read this straight-to-the-point tutorial: https://www.reddit.com/r/Prebuilts/comments/tgb64o/a_quick_and_easy_guide_to_buying_reasonably/

I'd recommend this HP OMEN, it has a great price for the specs: $1192 for RTX 3070 and Ryzen 5 5600X.

1. Visit TopCashback (NOT a referral link) and click the "Get Cashback Now" button to get an 8% cashback. Select the HP OMEN gaming PC GT12-1340m, select 16 GB memory, and the RTX 3070. Keep the SSD, you can save more money and do the upgrades yourself.
2. Apply discount code 10GAMER2022 at checkout. The PC should cost around $1440 - 10% - 8% = $1192 after the cashback.
3. HP rips you off with storage upgrades. As SSD types won't affect game load times, this $43 ADATA 512GB SSD or this $47 2TB HDD is good enough. Finally, you will get a default 256GB SSD + aftermarket storage for a reasonable price.