I think Pi 400 should be fairly obtainable. I just bought one used off Offerup for a reasonable barely-used price, but before doing so, I had researched many o

I think Pi 400 should be fairly obtainable. I just bought one used off Offerup for a reasonable barely-used price, but before doing so, I had researched many of the standard retailers and many (1/2 to 2/3 of the US Pi retailer list from what I recall) had the Pi 400 showing in stock, eg Makerbright, Canakit, etc. Whether they were/are actually in stock or if long delays are possible might be another question/story.