I can't bid at Treasury Direct, you have to be a "US Person" to do that.

I have an account at Treasury Direct that was set up many years ago and is rarely used. Most people I know detest using TD.

I've bought a bunch of treasuries the last couple of years at Fidelity, Schwab and TD Ameritrade. Pretty easy although each site has its quirks. I've only sold a couple. Part of my buying was some money I was holding for a house purchase. And part of the buying of treasuries might be causing me some pain at tax time since the rates were higher and I ended up with a lot more interest than expect.

For people that haven't done so you can usually opt to search only for treasuries and avoid searches than include TIPS and strips which sometimes comes up in searches.

With the liquidity and east of buying/selling I usually will go the treasury route instead of CDs.

Rich